什么叫用户受电端?

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问题:

什么叫用户受电端?

考点:电网运行及调度考试电网运行及调度考试题库
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假如你回到170万年前的中华大地上,你会见到的情景最可能是(  )

A.北京人在打制石器

B.元谋人在采集食物

C.河姆渡人在种植水稻

D.黄帝大战蚩尤

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用方框内单词的适当形式填空, 每词只能用一次。
read  talk  swim  play  wear  sing  listen to  hear  watch  help
1.In class we        the teacher when she reads the text. 
2.Tony likes music and he likes        . 
3.Be quiet!Can you        someone is singing a song? 
4.Betty always        the piano on weekends. 
5.Tom's aunt always        T shirts. 
6.Let's        this magazine. 
7.Daming usually        to his classmates. 
8.Amy is going to        in the lake. 
9.The family like        TV at home together. 
10.Li Lei always        others as Lei Feng. 
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学校的基本单位是年级。()

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维生素B1缺乏时可引起

A.脚气病

B.眼干燥症

C.癞皮病

D.佝偻病

E.口腔-生殖综合征

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义和团运动是一场反帝反封建的爱国运动。

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