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问题 单项选择题

目前，光热发电成本仍然超过2元/（千瓦时）。预计2050年前后，光热发电成本将下降到（）/（千瓦时）以内。

A.0.4元

B.0.5元

C.0.6元

D.0.7元

答案

参考答案：B

听力题

根据中文提示和上下文内容，用正确的单词形式填空

小题1:You should read more ________ (教育) books to improve your mind.

小题2:Do you think that_________ (知识) is the key to success?

小题3:He is planning to go _________（到国外）for further study these days.

小题4:I will never forget the _________(经历) of visiting Hong Kong Disneyland.

小题5:The government _________ (意识到) it was a serious problem.

小题6:Reading in the sun is ____________ (harm) to your eyes.

小题7:With the ___________ (develop), our country is getting stronger and stronger.

小题8:Can you answer the question           (correct) at once when the teacher asks you?

小题9:Last year our teachers went to some _________ (south) cities for their holiday.

小题10:It is ___________ (meaning) for you to spend your free time playing computer games.
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选择题

图是测电笔的结构示意图，其中由绝缘体构成的部分是

[ ]

A．笔尾金属体

B．塑料外壳

C．电阻

D．弹簧

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