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【单选题】
与电动机功率利用率计算无关的参数是( )。A.
铭牌功率
B.
输入电流
C.
电动机效率
D.
功率因数
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【简答题】阅读理解。 It's not entirely true that kids learn a second language easily, but it's still the best time to learn. Babies are basically equipped to hear and distinguish every possible language and dialect,...
【单选题】Kids don't learn their native language consciously, ________ they become fluent in it very fast.
A.
but
B.
and
C.
for
D.
so
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