ZD6系列电动转辙机碳刷与换向器接触面积不少于碳刷面积的（）。A.4/5 B.3/5

2012年1月份，我国居民消费价格总水平同比上涨了4.5%，比市场预期的稍稍高一些，其中食品价格上涨达到10.5%。为应对物价上涨的压力，某地政府提出要为企业做好“加减乘除”四篇文章。下列做法与对应的“加减乘除”要求一致的是 [ ]

A．“加法”：增加税收，尽量增加财政支出    

B．“减法”：科技创新，努力形成品牌效应

C．“乘法”：强化计划，规定生产要素分配    

D．“除法”：节能降耗，淘汰技术落后产能

“意思表示真实”就是说行为人( )。

A．表现于外部的表示

B．表现于外部的真实意志

C．内在的真实意志相一致

D．表现于外部的表示与其内在的真实意志相一致

由肾小球过滤到肾小囊的液体叫______，在流经______ 时，其中大部分水、部分无机盐和全部葡萄糖被周围的毛细血管重新吸收．

It doesn't matter when or how much a person sleeps, but everyone needs some rest to stay alive. That's what all doctors thought, until they heard about Al Herpin. Al Herpin, it was said, never slept. Could this be true? The doctors decided to see this strange man themselves.

Al Herpin was 90 years old when the doctors came to his home in New Jersey. They thought for sure that he got some sleep of some kind. So they stayed with him and watched every movement he made. But they were surprised. Though they watched him hour after hour and day after day, they never saw Herpin sleeping. In fact, he did not even own a bed. He never needed one.

The only rest that Herpin sometimes got was sitting in a comfortable chair and reading newspapers. The doctors were puzzled by this strange continuous sleeplessness. They asked him many questions, hoping to find an answer. They found only one answer that might explain his condition. Herpin remembered some talk about his mother having been injured several days before he was born. But that was all. Was this the real reason? No one could be sure.

Al Herpin died at the age of 95. 

41.The main idea of this passage is that _______

A. everyone needs some sleep to stay alive

B. people can live longer by trying not to sleep

C. large numbers of people do not need sleep

D. a person was found who actually didn't need any sleep

42.The doctors came to visit Herpin, expecting ______

A. to find out whether his sleeplessness was really true

B. to find out why some old people didn't need any sleep

C. to find a way to free people from the need of sleeping

D. to cure him of his sleeplessness

43. After watching him closely, the doctors came to believe that Al Herpin ____

A. needed no sleep at all              B. needed some kind of sleep     

C . was too old to need any sleep       D .often slept in a chair

44.One reason that might explain Herpin' s sleeplessness was ______

A. his mother's injury before he was born

B. his magnificent physical condition

C. that he had gradually got rid of the sleeping habit

D. that he hadn't got a bed

45.Al Herpin' s condition could be regarded as ______

A. a common one       B. very healthy     C. one that could be cured    D. a rare one

排水体制分几类，各类的特点，选择排水体制的原则是什么？