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【简答题】

The Clockwork Radio The British inventor Trevor Baylis created this really clever ′wind-up radio′ for people from Third World countries. in some parts of the Third World countries, it’s very hard for people to get or pay for enough energy. This radio uses no batteries (电池) and does not need any electricity to run it. A clockwork generator (发电机) is put inside the radio and works as the power. When it is fully wound up (上弦), the radio can work for long periods. The clock work product is not a new invention. The Victorians had already put it in wide use. We may find them used in toys as well. Then what is new about this clockwork radio? Baylis has used this but effective (高效的) way of creating electricity to both help the people of the Third World and to develop a product which is selling well in Western Europe. Even former President of South Africa, Nelson Mandella has one of these radios and personally recommends this product to others. 小题1:What does the clockwork radio use to run it? A.Batteries. B.Electricity. C.A clockwork generator. D.Wind power. 小题2:The Third World countries are       in the world. A.the rich countries B.the poor countries C.Western European D.Victorian countries 小题3:Which sentence is true according to the passage? A.the clockwork radio can work for only a short period of time. B.Trevor Baylis created the world’s first clockwork product. C.The clockwise radio is also a toy for people of the Third World. D.Nelson Mandella owns one of the clockwork radios.

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题目标签:发电机电池上弦
参考答案:
参考解析:
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【单选题】标准电池是作为()的标准量具.

A.
电阻
B.
电流
C.
电动势
D.
以上答案均不对

【单选题】发电机的调相运行是指()。

A.
发电机不发有功,发出无功
B.
发电机发出有功,吸收无功
C.
发电机发出有功,发出无功
D.
发电机吸收有功,吸收无功

【单选题】有三个电池 设这三个电池中各物质浓度都是0.1molL-1,则它们的()

A.
电池反应式不同,ε不同
B.
电池反应式不同,ε相同
C.
电池反应式相同,ε相同
D.
电池反应式相同,ε不同

【多选题】关于日常使用的干电池说法正确的有

A.
使用时需要识别区分正、负极
B.
要根据电压选择使用电池
C.
不同型号的干电池,提供电能是相同的
D.
要根据使用场合,选择适合电池外形尺寸