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问题 选择题

利用下图装置，可模拟铁的电化学防护。下列有关说法正确的是

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A．若X为碳棒，为减缓铁的腐蚀，开关K应置于M处

B．若X为锌板，K置于M或N处，均能减缓铁的腐蚀

C．若X为碳棒，K置于M或N处，一段时间后溶液pH均不变

D．若X为碳棒，K置于M或N处，Cl-均向X电极移动

答案

答案：B

听力题

单词拼写。根据首字母或中文提示写出该单词。

小题1:I ___________(认出) Tom the moment I came across him in the street last week, though we hadn’t met each other for years.

小题2:What he said _______________(证明是) to be true .

小题3:Tomorrow, my mother will take me to the hospital and have my body e____________.

小题4:How much do you c_______ for repairing my CD player?

小题5:She is c___________, because she has got an “A” in the exam.

小题6:Suddenly it started to rain. They had to take _________(庇护) under a big tree.

小题7:Time is p__________ to us. We must make the best of it。 .

小题8:It seems that living green is   _____  （惊人地）easy and affordable( 负担得起的). A small step makes a big difference. 

小题9:What are the____________ (功能)of minerals in our body.

小题10:As we all know, the majority of the s___________ of the earth is covered by water.
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单项选择题

把计算机与通信介质相连并实现局域网络通信协议的关键设备是( )。

A．串行输入口

B．多功能卡

C．电话线

D．网卡(网络适配器)
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