giúp em với ạ. Em cần gấp ạ

Một vật dao động theo phương trình x = -5cos(4pt - p/2)(cm).

a. Xác định biên độ dao động, tần số góc, chu kì, pha ban đầu và pha dao động của vật.

b.Viết phương trình vận tốc, gia tốc của vật.

c.Vận tốc của vật đạt cực đại,cực tiểu tại đâu và bằng bao nhiêu?

d. Gia tốc của vật đạt cực đại,cực tiểu tại đâu và bằng bao nhiêu?

e.Xác định ly độ,vận tốc, gia tốc của vật tại thời điểm t = 1s.

1. John applied for the job even though he has no experience in the field.

A. John didn’t apply for the job if he had experience in the field.

B. Because of his inexperience in the field, John didn’t apply for the job.

 C. John was unable to apply for the job because he was inexperienced in the field. D. In spite of his inexperience in the field, John applied for the job.

 2 Much as I respect your point of view, I can’t agree.

A. I can’t agree because I respect your point of view.

B. I respect your point of view, so I agree.

C. Even though I respect your point of view, I can’t agree.

D. I can’t agree with your point of view even if I respect you.

3. I did not answer the door even though I knew it was my friend.

A. Unless I knew it was my friend, I would not answer the door.

 B. I knew it was my friend, but I did not answer the door

C. I answered the door since I knew it was my friend.

D. Only when I answered the door did I knew it was my friend.

4. 

Some economists argue that new technology causes unemployment. Others feel that it allows more jobs to be created.

A. Some economists argue that new technology causes unemployment, so others feel that it allows more jobs to be created.

 B. Arguing that new technology causes unemployment, other economists feel that it allows more jobs to be created.

C. Some economists argue that new technology causes unemployment, whereas others feel that it allows more jobs to be created.

 D. Besides the argument that new technology causes unemployment, some economists feel that it allows more jobs to be created

5. Although Mohammed has now lost his title, people always remember him as the champion.

A. When Mohammed has lost his title, people remember him as the champion

. B. Because Mohammed has now lost his title, people always remember him as the champion.

C. Mohammed has now lost his title, but people always remember him as the champion.

D. People always remember Mohammed as the champion, but the fact is he has now lost his title.

hàm số y=(x² -4)² . (1-2x)³ có bao nhiêu điểm cực trị

viết lại câu

1. Mr. Smith wanted to get some fresh air in the room. He opened the window. (in order to)

 2. He went to the supermarket. He wanted to buy food for the whole week. (with a view to)

3. She is learning English because she wants to get a better job. (to)

4. She locked the door so as not to be disturbed. (in order that)

5. He wore sunglasses and a false beard. He wanted nobody to recognize him. (in order not to)

 6. I need to buy some laundry detergents so that I will wash my clothes. (in order to)

7. Banks are developed so that they can keep people’s money safe. (in order...to)

8. Alice borrowed an eraser to erase a mistake in his composition. (so that)

9. Kathy built a high wall round her garden for the fruits not to be stolen. (in order that)

 10. Please shut the gate for the cows not to get out of the cowshed. (so that)

BT: Một vật dao động theo phương trình x = -5cos(4pt - p/2)(cm).

a. Xác định biên độ dao động, tần số góc, chu kì, pha ban đầu và pha dao động của vật.

b.Viết phương trình vận tốc, gia tốc của vật.

c.Vận tốc của vật đạt cực đại,cực tiểu tại đâu và bằng bao nhiêu?

d. Gia tốc của vật đạt cực đại,cực tiểu tại đâu và bằng bao nhiêu?

e.Xác định ly độ,vận tốc, gia tốc của vật tại thời điểm t = 1s.

1. Mr. Smith wanted to get some fresh air in the room. He opened the window. (in order to)

 2. He went to the supermarket. He wanted to buy food for the whole week. (with a view to)

3. She is learning English because she wants to get a better job. (to)

4. She locked the door so as not to be disturbed. (in order that)

5. He wore sunglasses and a false beard. He wanted nobody to recognize him. (in order not to)

 6. I need to buy some laundry detergents so that I will wash my clothes. (in order to)

7. Banks are developed so that they can keep people’s money safe. (in order...to)

8. Alice borrowed an eraser to erase a mistake in his composition. (so that)

9. Kathy built a high wall round her garden for the fruits not to be stolen. (in order that)

 10. Please shut the gate for the cows not to get out of the cowshed. (so that)

1. They wanted to apologize for their behavior: that’s why they paid for dinner. (in order to)

 2. I walked quietly because I didn’t want to wake the baby. (so that)

 3. He locked the door to prevent the prisoner escaping. (so that)

4. She tries to learn English well so as to communicate with foreigners. (with a view to)

5. She wore dark glasses so that no one would recognize her. (with a view to)

 6. The reason why she applied for a job abroad was to earn more money. (with a view to

) 7. We left quietly so that we wouldn’t disturb him. (so as not to)

8. Lan tiptoed up the stairs because she didn’t want to wake anyone up. (in order not to)

9. He left without saying goodbye as he didn’t want to disturb the meeting. (so as not to)

 10. Mike put on his raincoat because he didn’t want to get soaked. (in order not to)

. I didn’t arrive in time to see him.

I wasn’t early _____
2. The children couldn’t go swimming because the sea was rough.

The sea was too __________
3. The house is so spacious that the children can run up and down. ENOUGH
The house _______
4. He couldn’t afford to buy the new car.

The new car _______
5. The furniture was so expensive that I didn’t buy it.

The furniture was too ___________________________
6. It was so late that nothing could be done.

It was too _______________
7. The water was so cold that the children couldn’t swim in it.

The water was not ______________
8. He was so tired that he fell asleep before the end of the film.

He was too ____________________
9. The book was so interesting that we couldn’t put it down.

It was _____________________
10. The damage was so great that it would cost millions of dollars to repair.

Such __