1. She wants her son to take part in the social activities

=> She suggests that

2. The doctor advised us to drink a lot of water to prevent sickness

=> The doctor suggested

3. Protect our environment!

=>I suggest our environment

1. My uncle cooks very well at a famous restaurant

=> My uncle is

2. He is a skillfull soccer player

=> He

3. Hoa is a very hard-working student

=> Hoa

4. They designed fashions cleverly

=> They were

5. We can't swim in this river because the water is highly polluted

=> Because of

6. He faild the exam because of not learning the lesson carefully

=> Because

7. We all admire this woman because she is wise

=> Because of

1. Why don't you stop working and take a rest, Peter?

=> I suggest

2. Why not take solid waste to recycling centers?

=> They sugget

=> They suggets that

1. Have Tom and Betty written this letter to their mother?
=> This letter...
2. Mrs. White ate a lot of fish yesterday, didn't she?
=> Were a lot of...
3. The girl hated smoke of the car so she wanted to walk to the park to breath fresh air.
=> The girl preferred...

1. Have Tom and Betty written this letter to their mother?
=> This letter...
2. Mrs. White ate a lot of fish yesterday, didn't she?
=> Were a lot of...
3. The girl hated smoke of the car so she wanted to walk to the park to breath fresh air.
=> The girl preferred...

Cho mạch điện xoay chiều nối tiếp AMB, đoạn mạch AM là cuộn dây không thuần (R,L không đổi) ,đoạn mạch MB là tụ điện có điện dung C thay đổi được. Điện áp tức thời hai đầu đoạn mạch AB có dạng u=Uocos (wt) luôn ổn định. Thay đổi điện dung C đến lúc điện áp hiệu dụng giữa hai điểm MB cực đại. Giữ cố định giá trị C đó. Điện áp hiệu dụng Uam=75V, tại thời điểm t khi giá trị tức thời Uab =75 căn 6 thì Uam= 25 căn 6. điện áp cực đại giữa hai đầu đoạn mạch AB là bao nhiêu?