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变压器的是利用电磁感应原理实现电能传输的设备，关于其功能以下说法错误的是（ ）。
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半导体的导电能力介于导体和绝缘体之间，其导电能力受外界影响较大，以下不能影响其导电性能的有（ ）。
三相四线制电路中，当负载不对称时，中线的作用是（ ）。
II. Complete the passage (2×10=20)Complete the passage with the proper words given below.satisfyentrepreneurialsuccessfulobviouslyadvantagefixtedprofitableearningscorporateradical Things are not quite as Black or White — not all big companies “cannot innovate”. There is a reason why big companies became “Big”. They 1______ were or are doing something right! But it is exactly that which then becomes a hot potato for them. Innovation for the sake of innovation is not useful anymore; they’ve got 2 ______ . to meet and big investors to 3 ______ . They now mostly care about innovation that can clearly help them grow or become more 4______ . Therein lies the problem — how do you know at a very early stage what is going to be 5 ______ in a business sense several years down the road? Market research is fine but it is not going to stay 6 ______ for several years into future while you bring the new idea to market.This is where smaller 7 ______ individuals and/or organizations have always had a big 8______ , if they are successful. It is a lot easier and speedier for them to work on a 9______ idea with higher chances of success than a larger established 10______ would even consider. If successful, such radical innovation companies then may grow like Google or Apple or alternatively may get acquired by these Big slower moving corporations.
50. Young people liked renting home furniture in that ____.
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