下列哪种情况常有震颤A．二尖瓣关闭不全 B．肺动脉瓣关闭不全 C．主动脉瓣关闭不全

My daughter finally lost her first tooth. She waited for this moment for more than a year.

Most of the kids in the first grade lost not only one tooth, but several. But my daughter kept waiting impatiently. Then, she finally got a loose (松的) tooth. I never saw her so happy — except on Christmas, Children’s Day or her birthday. Last Friday night, she was eating an apple, and the tooth started to become loose. Minutes later, my daughter shouted happily. The tooth was out!

I cleaned it off and put it under her pillow (枕头). When she went to bed that night, my daughter wondered, “Will the tooth fairy (牙仙) let me keep the tooth?” I told her she might and she’d have to wait and see.

The tooth fairy comes from an old story. It’s believed that when a kid loses his first tooth and puts it under his pillow, the tooth fairy will come to visit him when he is sleeping. If the tooth fairy sees the kid and loves him, she will leave some money under his pillow without taking away the tooth. If she doesn’t think the kid lovely enough, she will still leave some money but take the tooth away.

And then I put a dollar in my bag so that I’d remember to put it under my daughter’s pillow. However, I forgot. Luckily, her dear dad remembered.

小题1: How many of the following things make the writer’s daughter happy?

a. Christmas   b. Children’s Day

c. her birthday    d. the missing tooth

A．One.

B．Two.

C．Three.

D．Four.小题2: What do the two underlined words in Paragraph 3 mean?

A．my daughter; the tooth fairy

B．my daughter; my daughter

C．the tooth fairy; my daughter

D．the tooth fairy; the tooth fairy小题3:Which of the following is TRUE?

A．The daughter is a second-grader.

B．The writer is a mother.

C．The real tooth fairy in the story is the writer.

D．Several kids in the daughter’s class lost one tooth.小题4:What may be the best ending of the story?

A．A new tooth grew during my daughter’s sleep that night.

B．My daughter woke up at midnight and saw the beautiful tooth fairy.

C．The next morning my daughter was glad to find the money and the tooth.

D．The other kids in the first grade laughed at my daughter because she lost a tooth.

通常在对给定值改变的调节系统作分析时，多采用( )这个品质指标。

A．最大偏差

B．超调量

C．衰减比

D．余差

下列各句中，没有语病的一句是

A．一部《时间简史》，让量子理论物理学家霍金在中国读者中耳熟能详。但是，对于霍金的生平，大多数人或许并不知晓。

B．俄乌天然气纠纷事件暴露出欧盟能源严重依赖进口，且供应途径过于单一，欧盟国家开始认真反思能源安全这一重大问题。

C．教育部门应该研究“超女现象”，从中找到改进素质教育的方法，把说起来重要做起来不要的素质教育扎扎实实做到位。

D．利文斯顿的上述比喻，不仅使伦敦市长的声誉扫地，而且违反了伦敦市长应有的良好操行的规定。

采用中间再热循环的目的是降低汽轮机末级蒸汽（），提高（）。

简述法医物证检材的防止污染原则。