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【判断题】
额定电压为380v/220v,的单相变压器,若作升压变压器使用时,可在低压侧接380v的电源,高压侧输出电压达656v。( )
A.
正确
B.
错误
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【简答题】Fill in the blanks with the words given below. Change the form if necessary.(观看下方的微课可以帮助你完成此测试) Dear Sirs, I am writing to______ you that the goods your company shipped for us have not been supplied ...
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