如何通过看钎子判断出铜终点？

促进乳腺发育，使乳腺管增生的激素是（）。 A.雌激素

B.孕激素

C.雄激素

D.胎盘生乳素

E.生乳素抑制激素

阅读理解。

     Scientists have known for a long time that very loud noises can cause hearing damage or loss (损失).

The noise can be the sound of an airplane or machines in factories or loud music or other common sounds

found at home or at work.

     A famous scientist has found that using aspirin (阿斯匹林) can increase the temporary (暂时的) hearing

loss or damage from loud noises. He did an experiment using a number of volunteers who all had normal

hearing. He gave them different amounts of aspirin for different periods of time, then he tested their hearing

ability. He found that volunteers who were given four grams of aspirin a day for two days suffered (受苦)

much greater temporary hearing loss than those who did not use aspirin. The hearing loss was about two

times as great.

     The scientist said millions of persons in the world use much larger amounts of aspirin than those used

in his experiment. He said these persons may face a serious danger of suffering hearing loss from loud noises.

1. The passage tell us that one's hearing can be damaged (损伤) by_________.

A. the sound of an airplane or machines in factories

B. loud music or other common sounds found at home or at work

C. both A and B

2. Scientists have learned that _________.

A. one may die if he hears a loud noise

B. one may lose his hearing when he hears a terribly loud noise

C. loud noises can only cause damage to the hearing of young people

3. From the passage we know that aspirin _________.

A. can help us to improve our hearing ability

B. makes the temporary hearing damage from loud noises worse

C. makes the temporary hearing damage from loud noises better

4. A large number of people may suffer hearing loss because they_________.

A. take too much aspirin

B. don't realize the bad effect of loud noises

C. never take aspirin

5. Which of the following is true according to the passage?

A. Scientists have just found out that loud noises can't cause hearing damage or loss.

B. The volunteers who took eight grams of aspirin during two days suffered greater

     than those who didn't take aspirin.

C. The scientist did an experiment using volunteers who didn't have normal hearing.

了解物理规律的发现过程，学会像科学家那样观察和思考，往往比掌握知识本身更重要。以下符合事实的是

A．丹麦物理学家奥斯特梦圆电生磁，终于发现了电磁感应现象

B．英国物理学家麦克斯韦认为，磁场变化时会在空间激发一种电场

C．法拉第发现了电流的磁效应，拉开了研究电与磁相互关系的序幕

D．安培定则是用来判断通电导线在磁场中所受安培力方向的

末次月经为2001年3月25日，预产期是（）

A.2002年1月2日

B.2001年12月2日

C.2002年1月11日

D.2002年2月21日

E.2001年12月30日

以下关于变更地籍测量的说法正确的是( )。

A．对界址发生变化宗地的变更地籍测量，在增设新的界址点前，应利用原宗地草图的勘丈数据及界址点坐标，检查原界标是否移动或丢失

B．当界标移动、丢失时，应利用原测量数据恢复界标，然后取得有关指界人的同意后埋设新界标

C．对于虽已丢失，但变更后废弃的界址点也需要恢复

D．检查方法一般有：检查界址点与邻近界址点或邻近地物点的距离、解析法检查界址点坐标

E．对新增宗地的变更地籍测量，若利用原勘丈资料，应对原勘丈资料进行检查