搜题
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第1题

Recently a survey ________ prices of the same goods in two different supermarkets has caused heated debate among citiz
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第2题

当发电机组与电网间进行有功功率交换时,如果发电机的电压落后电网电压,则发电机
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第3题

We’d better discuss everything ________ before we work out the plan. A.in general B.on purpose C.in detail D.
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第4题

It sounds like something is wrong with the car’s engine. ________, we’d better take it to the garage immediately.
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