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问题 不定项选择题

某原电池构造如图所示。下列有关叙述正确的是

[ ]

A．在外电路中，电子由银电极流向铜电极

B．取出盐桥后，电流计的指针仍发生偏转

C．外电路中每通过0．1 mol电子，铜的质量理论上减小6．4g

D．原电池的总反应式为Cu＋2AgNO3＝2Ag＋Cu(NO3)2

答案

答案：D

填空题
请先阅读下面短文,用其适当形式填空白,每个词限用一次。
so  start  easy  badly  someone  difficult  if   thank   
class      reporter    medical  succeed
     I' m John Wood,  a doctor  at a  famous Boston hospital.   During the first two years  of high school, I
found biology very 1       . My report cards always said things like "must study harder" or "John shouldn't
choose science 2    ." It was really terrible for 3     who had always dreamed of becoming a doctor. I lost
confidence, so I left high school x j at sixteen and   4   working at a supermarket.
     One evening I saw a documentary about Albert Einstein. According to the documentary, Einstein had
done really 5    at school. I began to think that Einstein could 6    , then I may have a chance, too. I didn't want to leave my job, 7    I decided to go to night school to finish high school. Two years later, I went to a   8    university.
     I've often thought I should contact the   9          the Einstein documentary and   10        him. As for the biology teacher, I might contact her, too, one day - but not to thank her!
1____________  2___________  3_________4____________ 5____________
6_____________7____________  8__________9____________ 10_____________
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选择题

He has a great interest in ______ history, especially ______ history of the Tang Dynasty.

A．the, the

B．a；the

C．不填； the

D．the；不填
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