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【单选题】
自人类应用电力160多年来，电能的输送电线，目前应用较多的是用铜、铝等金属做成的导线。与之配套的还有铁塔、电杆等。导线输电有三大弊端，一是造价太高，二是用电线送电损耗太大，三是铁塔、电杆占用大量土地，导线耗用大量金属。能不能省去导线，用其他办法输电呢?( )。A.
省去导线无法输电
B.
微波输电就是一种无线输电
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【判断题】Do you prefer to write with your left hand? If you do, you are one of the millions of “lefties” in the world. There would be even more left-handed people in the world if many people weren’t forced to ...
A.
正确
B.
错误
【判断题】Do you prefer to write with your left hand? If you do, you are one of the millions of “lefties” in the world. There would be even more left-handed people in the world if many people weren’t forced to ...
A.
正确
B.
错误
【判断题】Do you prefer to write with your left hand? If you do, you are one of the millions of “lefties” in the world. There would be even more left-handed people in the world if many people weren’t forced to ...
A.
正确
B.
错误
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