有人编了一首顺口溜：“一棵玉米冲九霄，彩云栓住玉米腰，吓得月亮直弯腰。”这首顺口

项目管理实施规划、特殊施工技术方案（措施）以及工程变更需要业主项目部审批通过后才能有效实施。

Tears came into this mother’s eyes when she talked about waking up her son. Every morning, her ten-year-old boy puts up one finger with his eyes still closed, begging for one more minute to sleep.

Why is he so sleepy? Because, like thousands of student “early birds” in China, he has to get up before 6 a.m. every morning.

School students usually need eight to ten hours’ sleep a night. But in Shanghai, it’s reported that 90% of the students do not get enough sleep. And studies show that without a good night’s sleep, students seem to be weaker than they should be. Many become near-sighted as a result.

Li Ming, a student at Qinghua High School, said that he usually goes to bed after 11 p.m. But when he has exams coming up, he can stay up as late as midnight. This “night bird” lifestyle has made many students nod off in class. Li Ming said that it is during afternoon classes that he feel most sleepy. “My parents are usually happy to see me studying so late,” he said. “They think I work very hard and they make me cups of coffee.”

However, not all parents are happy about this. “My daughter gets up so early. She looks tired and it really hurts me.” said one of the parents. Why don’t so many students get enough sleep? Now many members of society began to think about it.

小题1:Why did the ten-year-old boy’s mother talk about waking up her son with tears in her eyes?

A．Because her son’s lack of sleep hurt her but she had to wake him up.

B．Because her son wasn’t good at lessons.

C．Because she thought her son was too lazy.

D．Because her son was badly ill.小题2:Which is NOT the result of lack of sleep?

A．The body’s weakness.

B．Nodding off in class.

C．Near-sighted eyes.

D．Poor academic developments.小题3:How does Li Ming’s mother feel to see him studying late?

A．Sorry.

B．Worried.

C．Not unhappy.

D．Angry.小题4:Which one is True according to the passage?

A．All the parents hope their children stay up.

B．No students complain about their lack of sleep.

C．Most students watch TV or play computer games deep into night.

D．Some parents are worried about the fact that most of the students don’t have enough sleep.

属于缓效杀菌剂的是

A．氨基糖苷类

B．利福霉素类

C．多黏菌素类

D．青霉素类

E．红霉素

中心静脉压高、血压正常时，应选择（）

A．适当补液

B．充分补液

C．扩张血管

D．强心、利尿

E．补液试验

如图所示，一半圆形玻璃砖外面插上P₁、P₂、P₃、P₄四枚大头针时，P₃、P₄恰可挡住P₁、P₂所成的像，则该玻璃砖的折射率n＝________．有一同学把大头针插在P₁′和P₂′位置时，在P₃、P₄一侧怎么也看不到大头针的像，其原因是________________________．