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Students are not allowed to handle these chemicals they are under the supervision of a teacher.

Students are not allowed to handle these chemicals ___________ they are under the supervision of a teacher.

If he had been looking where he was going, he into the wall.

If he had been looking where he was going, he ___________ into the wall.

I'll pay you double if you the work finished by Friday.

I'll pay you double if you ____________ the work finished by Friday.

If he hadn't wasted too much time, he in his examination.

If he hadn't wasted too much time, he ____________ in his examination.

If I were to leave my country, I disappointed.

If I were to leave my country, I ___________ disappointed.

I you wanted to invest money in business, I would have prevented you from doing it.

I ___________ you wanted to invest money in business, I would have prevented you from doing it.

We'll get wet if we out.

We'll get wet if we ____________ out.

I'm sure she if you explained the situation to her.

I'm sure she ___________ if you explained the situation to her.

That would happen if you to work tomorrow?

That will happen if you ___________ to work tomorrow?

If someone in here with a gun, I'd be very frightened.

If someone ___________ in here with a gun, I'd be very frightened.

If I had enough money, I abroad to improve my English.

If I had enough money, I ___________ abroad to improve my English.

If he a thorough knowledge of English, he could have applied for this post.

If he ___________ a thorough knowledge of English, he could have applied for this post.

If she him, she would be very happy.

If she __________ him, she would be very happy.

The patient could not recover unless he an operation.

The patient could not recover unless he ___________ an operation.

If there , the rice fields could have been more productive.

If there __________, the rice fields could have been more productive.

Were you to drive a car without a driving license, you by the police.

Were you to drive a car without a driving license, you _______________ by the police.

If I had gone to school yesterday, I the lesson today.

If I had gone to school yesterday, I ______________ the lesson today.

If I had known that you were in hospital, I you.

If I had known that you were in hospital, I ___________ you.

If you don’t keep silent, you wake the baby up.

If you don’t keep silent, you __________wake the baby up.

If I had a typewriter, I it myself.

If I had a typewriter, I ___________ it myself.

If I see him, I him a gift.

If I see him, I ___________ him a gift.

If I found Rob’s phone number now, I him about the change in plans.

If I found Rob’s phone number now, I ____________ him about the change in plans.

If Jake to go on the trip, would you have gone?

If Jake ____________ to go on the trip, would you have gone?

I didn’t get home until after midnight last night. Otherwise, I your call.

I didn’t get home until after midnight last night. Otherwise, I ___________ your call.

They would be here by now the early train.

They would be here by now ______________ the early train.

Come on! we hurry, we’ll miss the plane!

Come on! ___________we hurry, we’ll miss the plane!

more help, I could call my neighbor.

___________ more help, I could call my neighbor.

If the ball the line, that would have been the end of the game.

If the ball __________ the line, that would have been the end of the game.

You yourself ill if you don’t eat properly.

You ___________ yourself ill if you don’t eat properly.

If I ask Paul nicely, he us.

If I ask Paul nicely, he ___________ us.

If it fine tomorrow, we will go to the coast.

If it ____________ fine tomorrow, we will go to the coast.

If you to my advice in the first place, you wouldn’t be in this mess right now.

If you ____________ to my advice in the first place, you wouldn’t be in this mess right now.

You’d better take a coat it gets cold.

You’d better take a coat ____________ it gets cold.

The bus won’t stop you ring the bell.

The bus won’t stop _____________ you ring the bell.

If I could speak Spanish, I next year studying in Mexico.

If I could speak Spanish, I ____________ next year studying in Mexico.

According to the timetable, if the train on time, we arrive at 5.30.

According to the timetable, if the train ___________ on time, we ___________ arrive at 5.30.

If you help me with this exercise, I do the same for you one day.

If you help me with this exercise, I ____________ do the same for you one day.

Don’t bother to ring me it’s important.

Don’t bother to ring me _________ it’s important.

If energy inexpensive and unlimited, many things in the world would be different.

If energy ___________ inexpensive and unlimited, many things in the world would be different.

If everyone an extra hour a day, it would greatly increase production.

If everyone ___________ an extra hour a day, it would greatly increase production.

You can use my car you drive carefully.

You can use my car ___________ you drive carefully.

If you can give me one good reason for your acting like this, this incident again.

If you can give me one good reason for your acting like this, ____________ this incident again.

I you sooner had someone told me you were in hospital.

I ____________ you sooner had someone told me you were in hospital.

Rachel will be pleased she passes her driving test.

Rachel will be pleased ____________she passes her driving test.

If you up all the orange juice that was in that carton, you ought to go out and get some more.

If you ____________ up all the orange juice that was in that carton, you ought to go out and get some more.

I can’t understand what he sees in her! If anyone treated me like that, I extremely angry!

I can’t understand what he sees in her! If anyone treated me like that, I ____________ extremely angry!

If Dr. Mason I would have listened carefully.

If Dr. Mason ____________ I would have listened carefully.

If the machine , press this button.

If the machine ____________, press this button.

John win more races if he trained harder.

John ____________ win more races if he trained harder.

We’ll have lunch outside in the garden, it’s too cold.

We’ll have lunch outside in the garden, ____________ it’s too cold.

People think that he was born in a rich family.

People think that he was born in a rich family.

People say that the American women are used to living independently means

People say that the American women are used to living independently means

I get him to cut my hair.

I get him to cut my hair.

His parents made him do it.

His parents made him do it.

They saw him search the truck.

They saw him search the truck.

We found that they had cancelled the soccer match.

We found that they had cancelled the soccer match.

The manager had me do several jobs.

The manager had me do several jobs.

Does he realize that they are laughing at him?

Does he realize that they are laughing at him?

They say that John is the brightest student in class.

They say that John is the brightest student in class.

They think that he has died a natural death.

They think that he has died a natural death.

I don't understand why the students didn't keep silent while the speech .

I don't understand why the students didn't keep silent while the speech ____________.

No longer in our office since it .

No longer ____________ in our office since it ____________.

Something immediately to prevent teenagers from in factories and mines.

Something _____________ immediately to prevent teenagers from ____________ in factories and mines.

The preparations by the time the guests .

The preparations ____________ by the time the guests ____________.

Education to be the most important element to develop a country.

Education ____________ to be the most important element to develop a country.

In the USA the first stage of compulsory education as elementary education.

In the USA the first stage of compulsory education ____________ as elementary education.

Lots of houses by the earthquake.

Lots of houses ____________ by the earthquake.

The telephone by Alexander Graham Bell.

The telephone ____________ by Alexander Graham Bell.

English has become a second language in countries like India, Nigeria or Singapore where for administration, broadcasti?

English has become a second language in countries like India, Nigeria or Singapore where ____________ for administration, broadcasting and education.

yet? Have the letters been typed

____________ yet?

All bottles before transportation.

All bottles ____________ before transportation.

It that learning a foreign language a lot of time.

It ____________ that learning a foreign language ____________ a lot of time.

I hate personal questions by nearly acquainted friends.

I hate ____________ personal questions by nearly acquainted friends.

Reagan an actor years ago.

Reagan ____________ an actor years ago.

Beethoven’s Fifth Symphony next weekend.

Beethoven’s Fifth Symphony ____________ next weekend.

Bicycles in the driveway.

Bicycles ____________ in the driveway.

Our children to school by bus every morning.

Our children ____________ to school by bus every morning.

These students were seen in the school yard at 8 am yesterday.

These students were seen ____________ in the school yard at 8 am yesterday.

I in the lounge for ten minutes.

I ____________ in the lounge for ten minutes.

These students so much that they feel very tired and bored.

These students ____________ so much that they feel very tired and bored.

They time and money doing such a thing.

They ____________ time and money doing such a thing.

that military expenditure is extremely high.

____________ that military expenditure is extremely high.

Gold in California in the 19th century.

Gold ____________ in California in the 19th century.

“The maintenance people didn’t remove the chairs from ballroom”. “Don’t the worry. “They them before the dance ?

“The maintenance people didn’t remove the chairs from ballroom”. “Don’t the worry.
“They ____________ them before the dance begins”.

“David is in prison for smoking drugs”. “He that it was against the law.”

“David is in prison for smoking drugs”. “He ____________ that it was against the law.”

“Those eggs of different colors are very artistic.” “Yes, they in Russia”

“Those eggs of different colors are very artistic.” “Yes, they ____________ in Russia”

By the time we arrived, all the food by them.

By the time we arrived, all the food ____________ by them.

The team has too many members, so it into two groups.

The team has too many members, so it __________ into two groups.

Your bill should before you leave the hotel.

Your bill should __________ before you leave the hotel.

Many people believe we can look forward to the day when even our household jobs like cleaning and decorating by compute?

Many people believe we can look forward to the day when even our household jobs like cleaning and decorating __________ by computer-control robots.

So much progress that there may be space-frights to Mars.

So much progress __________ that there may be space-frights to Mars.

Grass by fat cows on the green meadow.

Grass __________ by fat cows on the green meadow.

Many US automobiles in Detroit, Michigan.

Many US automobiles __________ in Detroit, Michigan.

Mary traffic accidents by dangerous driving.

Mary traffic accidents __________ by dangerous driving.

I still can’t believe! My bicycle last night.

I still can’t believe! My bicycle __________ last night.

Parrots and crows the most intelligent birds.

Parrots and crows ____________ the most intelligent birds.

America by Columbus in 1492.

America _____________ by Columbus in 1492.

The man is thought before the ambulance came.

The man is thought ___________ before the ambulance came.

The flight attendant reminded the man that smoking there.

The flight attendant reminded the man that smoking ____________ there.

I insisted a higher position in the company.

I insisted ____________ a higher position in the company.

The guard at the gate insisted that everybody the rules.

The guard at the gate insisted that everybody ____________ the rules.

I would rather she tomorrow than today.

I would rather she ____________ tomorrow than today.

She suggested that we in the lobby of the hotel at 9:00 a.m.

She suggested that we ____________ in the lobby of the hotel at 9:00 a.m.

The doctor insisted that she to the hospital for tests.

The doctor insisted that she ____________ to the hospital for tests.

She'd rather than a speech.

She'd rather ______________ than ______________ a speech.

It is strange that he so upset about such a trifle, isn't it?

It is strange that he ____________ so upset about such a trifle, isn't it?

He decided to go inside the haunted house, what may.

He decided to go inside the haunted house, ____________ what may.

It is advisable that you your application as soon as possible.

It is advisable that you ____________ your application as soon as possible.

They recommend that she to a ski resort in Spain.

They recommend that she ____________ to a ski resort in Spain.

It is necessary that everything ready by two o'clock tomorrow.

It is necessary that everything ____________ ready by two o'clock tomorrow.

I suggested that she her lawyer before signing the contract.

I suggested that she ____________ her lawyer before signing the contract.

I demand that he immediately.

I demand that he ____________immediately.

It is important that we home as soon as we arrive.

It is important that we ____________ home as soon as we arrive.

The landlord requested that John out of the apartment.

The landlord requested that John ____________ out of the apartment.

The boss asks that you early for your first day of work.

The boss asks that you ____________ early for your first day of work.

The doctors recommended that she a holiday.

The doctors recommended that she ____________ a holiday.

I hope that he his homework on time.

I hope that he ____________ his homework on time.

The chairman moved that the meeting moved to Wednesday.

The chairman moved that the meeting ____________ moved to Wednesday.

It is necessary that every student a uniform.

It is necessary that every student ____________ a uniform.

If the tickets cheaper, we would have gone to the concert.

If the tickets ___________ cheaper, we would have gone to the concert.

The boss insisted that the salesforce its results.

The boss insisted that the salesforce _______ its results.

If only he more skillful, he would make a good football player.

If only he _____________ more skillful, he would make a good football player.

The UN requested that the government its policy.

The UN requested that the government _____________ its policy.

With your ability, you out the puzzle within a few minutes.

With your ability, you _____________ out the puzzle within a few minutes.

Without electricity, what ?

Without electricity, what _____________?

Look! What you’ve done! You have been more careful.

Look! What you’ve done! You _____________ have been more careful.

The two strangers talked as if they friends for years.

The two strangers talked as if they _____________ friends for years.

He was very busy yesterday, otherwise, he to your birthday party.

He was very busy yesterday, otherwise, he _____________ to your birthday party.

–“What will you do during winter vacation?” –“I don’t know, but it’s about time something.”

–“What will you do during winter vacation?”
–“I don’t know, but it’s about time _____________something.”

the fog, we should have reached our school.

_____________ the fog, we should have reached our school.

If there were no subjunctive mood, English much easier.

If there were no subjunctive mood, English _____________ much easier.

It is essential that the sponsor the file early.

It is essential that the sponsor _____________ the file early.

I wish this English course the whole year.

I wish this English course _____________ the whole year.

It is necessary that children of their old parents.

It is necessary that children _____________ of their old parents.

It's high time we these mice.

It's high time we _____________ these mice.

His friends suggest that the for that post.

His friends suggest that the _____________ for that post.

I am not a teacher of English, but suppose I , then I set up a language centre.

I am not a teacher of English, but suppose I _____________, then I _____________ set up a language centre.

This poor old man wishes he .

This poor old man wishes he _____________.

I suggest that the doctor up his mind without delay.

I suggest that the doctor _____________ up his mind without delay.

He was busy yesterday, otherwise he to the meeting.

He was busy yesterday, otherwise he _____________ to the meeting.

The law requires that everyone his car checked at least once a month.

The law requires that everyone _____________ his car checked at least once a month.

We might have failed if you us a helping hand.

We might have failed if you _____________ us a helping hand.

His doctor suggested that he short trip abroad.

His doctor suggested that he _____________ short trip abroad.

I can’t stand him. He always talks as though he everything.

I can’t stand him. He always talks as though he _____________ everything.

You are late. If you a few minutes earlier, you him.

You are late. If you _____________ a few minutes earlier, you _____________ him.

I enjoyed the movie very much. I wish I the book from which it was made.

I enjoyed the movie very much. I wish I _____________ the book from which it was made.

She wishes she a fairy now.

She wishes she _____________ a fairy now.

I wish another more effective teaching method used.

I wish another more effective teaching method _____________ used.

She wishes she a doctor now.

She wishes she ________________ a doctor now.

The spacemen felt as if he in a paradise.

The spacemen felt as if he _____________ in a paradise.

I wish I to retake my exams.

I wish I _____________ to retake my exams.

Cho hình lập phương $ABCD.A'B'C'D'.$ Mặt phẳng $BDC'$ chia khối lập phương thành $2$ phần có tỉ số thể tích phần bé chia?

Cho hình lập phương $ABCD.A'B'C'D'.$ Mặt phẳng $BDC'$ chia khối lập phương thành $2$ phần có tỉ số thể tích phần bé chia phần lớn bằng
b.png

Cho hình lập phương $ABCD.A'B'C'D'.$ $I$ là trung điểm $BB'.$ Mặt phẳng $\left( DIC' \right)$ chia khối lập phương thành?

Cho hình lập phương $ABCD.A'B'C'D'.$ $I$ là trung điểm $BB'.$ Mặt phẳng $\left( DIC' \right)$ chia khối lập phương thành $2$ phần có tỉ số thể tích phần bé chia phần lớn bằng
a.png

Cho hình lập phương $ABCD.A'B'C'D'$ có $D'B=a\sqrt{3}.$ Tính thể tích khối lập phương

Cho hình lập phương $ABCD.A'B'C'D'$ có $D'B=a\sqrt{3}.$ Tính thể tích khối lập phương

Cho $ABCD.A'B'C'D'$ là hình lập phương, $AC=5\sqrt{2}.$ Tính $V$

Cho $ABCD.A'B'C'D'$ là hình lập phương, $AC=5\sqrt{2}.$ Tính $V$

Cho $ABCD.A'B'C'D'$ là hình lập phương cạnh $a.$ Tính $V.$

Cho $ABCD.A'B'C'D'$ là hình lập phương cạnh $a.$ Tính $V.$

Người ta muốn xây một bồn cầu chứa nước dạng khối hộp chữ nhật trong phòng tắm. Biết chiều dài, chiều rộng, chiều cao củ?

Người ta muốn xây một bồn cầu chứa nước dạng khối hộp chữ nhật trong phòng tắm. Biết chiều dài, chiều rộng, chiều cao của khối hộp đó lần lượt là $5m,1m,2m.$ Biết mỗi viên cạch có chiều dài $20cm,$ chiều rộng $10cm,$ chiều cao$5cm.$ Hỏi người ta sử dụng ít nhất bao nhiêu viên gạch để xây bồn đó và thể tích của bồn chứa nhiêu lít nước? (Giả sử lượng xi măng và cát không đáng kể)
c.png

Cho hình hộp $ABCD.A'B'C'D',$ trong các mệnh đề sau, mệnh đề nào đúng. Tỉ số thể tích của khối tứ diện $ACB'D'$ và khối ?

Cho hình hộp $ABCD.A'B'C'D',$ trong các mệnh đề sau, mệnh đề nào đúng. Tỉ số thể tích của khối tứ diện $ACB'D'$ và khối hộp $ABCD.A'B'C'D'$ bằng?

Cho hình hộp $ABCD.A'B'C'D'$ có đáy là hình chữ nhật với $AB=\sqrt{3},AD=\sqrt{7}.$ Hai mặt bên $\left( ABB'A' \right)$ ?

Cho hình hộp $ABCD.A'B'C'D'$ có đáy là hình chữ nhật với $AB=\sqrt{3},AD=\sqrt{7}.$ Hai mặt bên $\left( ABB'A' \right)$ và $\left( ADD'A' \right)$ lần lượt tạo với đáy những góc ${{45}^{0}}$ và ${{60}^{0}}.$ Tính thể tích khối chóp nếu biết cạnh bên bằng $1.$

Cho hình hộp $ABCD.A'B'C'D'$ có đáy là một hình thoi và hai mặt chéo $ACC'A',BDD'B'$ đều vuông góc với mặt phẳng đáy. Ha?

Cho hình hộp $ABCD.A'B'C'D'$ có đáy là một hình thoi và hai mặt chéo $ACC'A',BDD'B'$ đều vuông góc với mặt phẳng đáy. Hai mặt này có diện tích lần lượt bằng $100c{{m}^{2}},105c{{m}^{2}}$ và cắt nhau theo một đoạn thẳng có độ dài $10cm.$ Khi đó thể tích của hình hộp đã cho là

Đường chéo của hình hộp chữ nhật bằng $d,$ góc giữa đường chéo của hình hộp và mặt đáy bằng $\alpha ,$ góc nhọn giữa hai?

Đường chéo của hình hộp chữ nhật bằng $d,$ góc giữa đường chéo của hình hộp và mặt đáy bằng $\alpha ,$ góc nhọn giữa hai đường chéo của mặt đáy bằng $\beta .$ Tính thể tích khối chóp bằng

Hình hộp đứng $ABCD.A'B'C'D'$ có đáy là một hình thoi với diện tích ${{S}{1}}.$ Hai đường chéo $ACC'A'$ và $BDD'B'$ có d?

Hình hộp đứng $ABCD.A'B'C'D'$ có đáy là một hình thoi với diện tích ${{S}_{1}}.$ Hai đường chéo $ACC'A'$ và $BDD'B'$ có diện tích lần lượt bằng ${{S}_{2}},{{S}_{3}}.$ Khi đó thể tích của khối hình hộp là ?

Cho biết thể tích của hình hộp chữ nhật là $V,$ đáy là hình vuông cạnh $a.$ Khi đó diện tích toàn phần của hình hộp bằng

Cho biết thể tích của hình hộp chữ nhật là $V,$ đáy là hình vuông cạnh $a.$ Khi đó diện tích toàn phần của hình hộp bằng

Cho $ABCD.A'B'C'D'$ là hình hộp chữ nhật $AC=16,AB=4\sqrt{2},AC'$ hợp với đáy góc ${{60}^{0}}.$ Tính $V.$

Cho $ABCD.A'B'C'D'$ là hình hộp chữ nhật $AC=16,AB=4\sqrt{2},AC'$ hợp với đáy góc ${{60}^{0}}.$ Tính $V.$

Cho $ABCD.A'B'C'D'$ là hình hộp chữ nhật, chiều dài $a\sqrt{3},$ chiều rộng là $a,AD'$ hợp với đáy góc ${{30}^{0}}.$ Tín?

Cho $ABCD.A'B'C'D'$ là hình hộp chữ nhật, chiều dài $a\sqrt{3},$ chiều rộng là $a,AD'$ hợp với đáy góc ${{30}^{0}}.$ Tính $V.$

Cho $ABCD.A'B'C'D'$ là hình hộp chữ nhật , chiều dài $2a,$ chiều rộng $a,$ chiều cao là $a\sqrt{3}.$ Tính $V$

Cho $ABCD.A'B'C'D'$ là hình hộp chữ nhật , chiều dài $2a,$ chiều rộng $a,$ chiều cao là $a\sqrt{3}.$ Tính $V$

Hình hộp chữ nhật có $3$ kích thước $a,b,c$ thì đường chéo $d$ có độ dài là

Hình hộp chữ nhật có $3$ kích thước $a,b,c$ thì đường chéo $d$ có độ dài là

Cho lăng trụ $ABC.A'B'C'$ có độ dài cạnh bên bằng $2a,$ đáy $ABC$ là tam giác vuông tại $A,AB=a,AC=a\sqrt{3}$ và hình ch?

Cho lăng trụ $ABC.A'B'C'$ có độ dài cạnh bên bằng $2a,$ đáy $ABC$ là tam giác vuông tại $A,AB=a,AC=a\sqrt{3}$ và hình chiếu vuông góc của đỉnh $A'$ trên mặt phẳng $\left( ABC \right)$ là trung điểm của cạnh $BC.$ Gọi $V$ là thể tích khối chóp $A'.ABC$ và $M$ là cosin của góc giữa hai đường thẳng $AA',B'C$ tính theo $a.$ Khi đó $V$ và $M$ kết quả lần lượt là

Cho hình lăng trụ $ABCD.A'B'C'D'$ có đáy $ABCD$ là hình vuông cạnh $a,$ cạnh bên $AA=a,$ hình chiếu vuông góc của $A'$ t?

Cho hình lăng trụ $ABCD.A'B'C'D'$ có đáy $ABCD$ là hình vuông cạnh $a,$ cạnh bên $AA=a,$ hình chiếu vuông góc của $A'$ trên mặt phẳng $\left( ABCD \right)$ trùng với trung điểm $I$ của $AB.$ Gọi $K$ là trung điểm của $BC.$ Tính theo $a$ thể tích khối chóp $A'.IKD.$

Cho lăng trụ tam giác$ABC.A'B'C'$ có đáy $ABC$ là tam gíac vuông cân tại là tam giác vuông cân tại $B,AB=a.$ Hình chiếu ?

Cho lăng trụ tam giác$ABC.A'B'C'$ có đáy $ABC$ là tam gíac vuông cân tại là tam giác vuông cân tại $B,AB=a.$ Hình chiếu vuông góc của điểm $A'$ lên mặt phẳng $\left( ABC \right)$ là điểm $H$ thuộc cạnh thuộc cạnh $AC$ sao cho $HC=2HA.$ Mặt bên $\left( ABB'A' \right)$ hợp với mặt đáy $\left( ABC \right)$ một góc bằng ${{60}^{0}}.$ Tính theo $a$ thể tích của khối lăng trụ $ABC.A'B'C'.$

Cho hình lăng trụ $ABCA'B'C'$ có đáy $ABC$ là tam giác vuông tại $A$ và $\widehat{ABC}={{30}^{0}}.$ Biết $M$ là trung đi?

Cho hình lăng trụ $ABCA'B'C'$ có đáy $ABC$ là tam giác vuông tại $A$ và $\widehat{ABC}={{30}^{0}}.$ Biết $M$ là trung điểm của $AB,$ tam giác $MA'C$ đều cạnh $a$ và nằm trong mặt phẳng vuông góc với mặt phẳng đáy hình lăng trụ. Tính theo $a$ thể tích khối lăng trụ $ABC.A'B'C'.$

After from university, he decided to move to Japan.

After _____________ from university, he decided to move to Japan.

He would sooner retire on a pension than part in such scandalous business deals

He would sooner retire on a pension than _____________ part in such scandalous business deals

Cho lăng trụ $ABCABCAB=2a,AC=a,AA'=\frac{a\sqrt{10}}{2},\widehat{BAC}={{120}^{0}}.$ Hình chiếu vuông góc của $C'$ lên mặ?

Cho lăng trụ $ABCABCAB=2a,AC=a,AA'=\frac{a\sqrt{10}}{2},\widehat{BAC}={{120}^{0}}.$ Hình chiếu vuông góc của $C'$ lên mặt phẳng $\left( ABC \right)$ là trung điểm của cạnh $BC.$ Tính thể tích khối lăng trụ $ABC.A'B'C'.$

Before the decision, you should think about it more carefully.

Before _____________ the decision, you should think about it more carefully.

Cho hình lăng trụ tam giác $ABC.A'B'C',$ đáy $ABC$ là tam giác vuông cân tại $B,AB=a.$ hình chiếu vuông góc của điểm $A'?

Cho hình lăng trụ tam giác $ABC.A'B'C',$ đáy $ABC$ là tam giác vuông cân tại $B,AB=a.$ hình chiếu vuông góc của điểm $A'$ lên mặt phẳng $\left( ABC \right)$ là điểm $H$ thuộc cạnh $AC$ sao cho $HC=2HA.$ Mặt bên $\left( ABB'A' \right)$ hợp với mặt đáy $\left( ABC \right)$ một góc bằng ${{60}^{0}}.$ Tính theo $a$ thể tích của khối lăng trụ $ABC.A'B'C'.$

Cho lăng trụ $ABC.{{A}{1}}{{B}{1}}{{C}{1}}$ có đáy $ABC$ là tam giác vuông tại $A,AB=2,BC=4.$ Hình chiếu vuông góc của đ?

Cho lăng trụ $ABC.{{A}_{1}}{{B}_{1}}{{C}_{1}}$ có đáy $ABC$ là tam giác vuông tại $A,AB=2,BC=4.$ Hình chiếu vuông góc của điểm ${{A}_{1}}$ trên mặt phẳng $\left( ABC \right)$ trùng với trung điểm của $AC.$ Góc giữa hai mặt phẳng $\left( BC{{C}_{1}}{{B}_{1}} \right)$ và $\left( ABC \right)$ bằng ${{60}^{0}}.$ Tính thể tích khối lăng trụ đã cho

After from the horse back, he was taken to hospital and had an operation.

After _____________ from the horse back, he was taken to hospital and had an operation.

He has this enviable ability everything that's unpleasant in life.

He has this enviable ability _____________ everything that's unpleasant in life.

After several months of studying Japanese, I am finally beginning native speakers when they talk to me.

After several months of studying Japanese, I am finally beginning _____________ native speakers when they talk to me.

The Oscar-winning actor avoids talking to his fans and refuses his autograph.

The Oscar-winning actor avoids talking to his fans and refuses _____________ his autograph.

Tina expects the children cleaning their rooms before their grandparents arrive this afternoon.

Tina expects the children _____________ cleaning their rooms before their grandparents arrive this afternoon.

We were very thrilled the opportunity to speak to the Dalai Lama in person.

We were very thrilled _____________ the opportunity to speak to the Dalai Lama in person.

Mr. Thompson was interested in for the new position as regional manager.

Mr. Thompson was interested in _____________ for the new position as regional manager.

Nathan claims to from Harvard at the age of 16, but I don't believe him.

Nathan claims to _____________ from Harvard at the age of 16, but I don't believe him.

Don't waste your time in the phone book. Just look the address up on the Internet.

Don't waste your time _____________ in the phone book. Just look the address up on the Internet.

I recall the Grand Canyon once as a child, but I don't remember it very well.

I recall _____________ the Grand Canyon once as a child, but I don't remember it very well.

Fiona and Diedre really want to the party.

Fiona and Diedre really want _____________ to the party.

Sari's belief in not eating meat made it difficult restaurants while we were traveling.

Sari's belief in not eating meat made it difficult _____________ restaurants while we were traveling.

Mike's desire the world is what made him join the foreign service. Now, he's working in the embassy in Ulaan Baatar, Mo?

Mike's desire _____________ the world is what made him join the foreign service. Now, he's working in the embassy in Ulaan Baatar, Mongolia.

There is no need anything when you come to my birthday party. No food, no gifts - just bring yourself.

There is no need _____________ anything when you come to my birthday party. No food, no gifts - just bring yourself.

Paul sat on a hill the mother bear and her cubs until they disappeared into the forest.

Paul sat on a hill _____________ the mother bear and her cubs until they disappeared into the forest.

Fred is continuing karate lessons even though he broke his hand.

Fred is continuing _____________ karate lessons even though he broke his hand.

Tom loves in smaller towns where he can get to know the locals. He would never live in a big city.

Tom loves _____________ in smaller towns where he can get to know the locals. He would never live in a big city.

If you can't find the key, try the lock with something else, like a knife or a screwdriver.

If you can't find the key, try _____________ the lock with something else, like a knife or a screwdriver.

Did you remember your swimsuit? Our vacation in Hawaii won't be much fun if you can't go swimming.

Did you remember _____________ your swimsuit? Our vacation in Hawaii won't be much fun if you can't go swimming.

I completely forgot here when I was a kid. But now I remember! My parents brought me here when I was three.

I completely forgot _____________ here when I was a kid. But now I remember! My parents brought me here when I was three.

She tried him the terrible truth, but she just couldn't bring herself to do it.

She tried _____________ him the terrible truth, but she just couldn't bring herself to do it.

Lydia really regrets out of high school. She has really had to struggle to make a living because of that decision.

Lydia really regrets _____________ out of high school. She has really had to struggle to make a living because of that decision.

We hired professional translators the documents into Arabic and Chinese.

We hired professional translators_____________ the documents into Arabic and Chinese.

CÔNG TY CỔ PHẦN CÔNG NGHỆ GIÁO DỤC TRỰC TUYẾN ALADANH

Trụ sở: Tầng 3 No – 25 Tân Lập, Quỳnh Lôi, Hai Bà Trưng, Hà Nội

VP: Số 24 - Trung Yên 11 - Cầu Giấy - Hà Nội.

02432 99 98 98 moon@moon.vn

Mã số thuế: 0103326250 Chịu trách nhiệm nội dung: Trần Duy Trang

Giấy phép thiết lập mạng xã hội số: 360/GP-BTTT Bộ thông tin và Truyền thông cấp ngày 26/7/2017

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