问题 选择题

(08山东实验中学,13)如右图所示装置,两玻璃管中盛满滴有酚酞溶液的NaCl饱和溶液,C(Ⅰ)、C(Ⅱ)为多孔石墨电极。接通S1后,C(Ⅰ)附近溶液变红,两玻璃管中有气体生成。一段时间后(两玻璃管中液面未脱离电极),断开S1,接通S2,电流表的指针发生偏转,说明此时该装置形成了原电池,关于该原电池的叙述正确的是

A.C(I)的电极反应式是2H+2e = H2

B.C(II)的电极反应式是Cl2+2e=2Cl

C.C(I)的电极名称是阴极

D.C(II)的电极名称是负极

答案

本题考查原电池和电解池,较难题。接通S1后,为电解池,C(Ⅰ)附近溶液变红,则C(Ⅰ)上H放电,C(Ⅰ)上聚集H2,从而可以判断C(Ⅱ)上Cl放电,C(Ⅱ)上聚集Cl2。断开S1,接通S2,为原电池,此时C(Ⅰ)为负极,电极反应为:H2-2e=2H,C错,A错;C(Ⅱ)为正极,电极反应为:Cl2+2e=2Cl,D错,B对。

阅读理解

阅读短文,选择正确答案。

     One of my favourite memories as a child is going by the river and sitting freely on the bank. There I would

enjoy the peace and quiet, watch the water rush down and hear the sound of falling leaves.

     When I think about the bamboo tree's ability to return to its original position, the word "resilience" comes to

mind. When used to describe a person, this word means the ability to become well again from shock,

disappointment or any other situation that makes somebody unhappy.

     Have you ever felt you are about to break with a sudden noise? Have you ever felt you are at your breaking

point? Thankfully, you are lucky to have the experience to live to talk about it.

     Life is a mixture of good times and bad times, happy moments and unhappy moments. Next time you are

experiencing one of those bad times or unhappy moments that take you close to your breaking point, don't break.

Try your best not to let the situation get the best of (占上风) you. 

     Hopes will take you through the unpleasant experience. With hopes for a better tomorrow or a better

situation, things may not be as bad as they seem to be. The unpleasant experience may be easier to deal with if

the end result is worth having.

     If you are at your breaking point, you should be like the bamboo tree, bend, but don't break!

1. The writer was moved by _______ one day when he went to sit by the river. [ ]

A. the water

B. the bamboo tree

C. the leaves

2. What does the underlined word "resilience" mean? It means _______. [ ]

A. 恢复力

B. 兴奋

C. 忧伤

3. What did the writer use to do when he was young? [ ]

A. He used to go to the park to hear the sound of falling leaves.

B. He used to go to the lake and watch the water.

C. He used to go by the river and sit on the bank.

4. Next time you experience one of those bad things, try your best ______ get the best of you. [ ]

A. to let the situation

B. not to let the situation

C. to change the situation to

5. What can we learn from the passage? [ ]

A. We should bend when we hear a sudden noise.

B. We should go by the river and sit freely on the bank.

C. We should have the ability to become well again.

单项选择题