【单选题】【消耗次数：1】
I __________ an interesting news item in yesterday’s Times.
①
came across
②
came up
③
came to
④
came over
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The manager came over and asked the customer how ___.
①
did the quarrel came about
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The news came _____ we won the first prize in the competition.
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The news came _____ we won the first prize in the competition.
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Mr. Li came across an old friend yesterday. They were both surprised.划线部分应该翻译成“登门拜访”
①
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②
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随机题目
【多选题】
交流绕组的基本要求是下列那几条？
①
产生的绕组电势要尽可能大，波形要尽可能接近正弦波
②
各相的电势、电阻、电抗在数值上尽可能相等，在相位上也要对称
③
端接线尽可能短，以节约铜线，减少损耗
④
元件制造方便，嵌线工艺方便，便于保证质量和节约成本