根据句意及首字母（或汉语）提示完成单词

1. Jiang Lei is a g           from Peking University.

2.Teachers are s           to know a lot and care for the students.

3. I put the letter into the e           and then had it mailed.

4. I will tell you a piece of d           news that we didn't get the first prize.

5. After he made a mistake, Jim got very           (紧张的) .

6. Some students from poor v           in China often don't have enough money for college education.

7. We had seven subjects this s           .

8. Scott is a h           student. He always studies hard.

9. I'm sorry to           (打扰）you. Can you lend me your pen?

10. The students didn't have classes last night. They stayed in the           (宿舍).

通常采取在曲轴上安装（）和采用多缸结构形式来提高柴油机运转的均匀性。

A.飞轮

B.减震器

C.皮带轮

D.链轮