施加90°脉冲后，关于质子宏观磁化矢量M的描述错误的是（）

A.A

B.B

C.C

D.D

E.E

单词拼写。

1. You are s _____ to take a bunch of flowers to meet the new teacher.

2. I'm very i _____ in this work. What about you?

3. Bob is not in the classroom. P_____ he is in the teacher's office.

4. I saw many old people w _____ in line buying cheap eggs.

5. Last month, our school called on us students to r _____ money and clothes for the students in Sichuan.

6. Ideas about etiquette are different b _____ people in China and Europe.

7. All of these gifts are very common. Do you have anything s _____?

8. She spoke slowly and c _____ so that everybody could hear her.