题目内容
联接组号不同的变压器不能并联运行是因为（ ）。
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额定电压相等，联结组别分别为Yy0和Yd11的两台变压器并列运行，二次电压差可达( )额定电压。
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The sentence"The hospital's lazy, unproductive workers are ready to turn in their brooms" is ______.
Before writing a business report, you must ask yourself two important questions. They are
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