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【单选题】
单相半波整流电路如图所示,变压器副边电压有效值 U 2 为 10V ,则输出电压的平均值 U o 是( )A.
14.1V
B.
4.5V
C.
9V
D.
10V
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举一反三
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A.
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B.
2
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3
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4
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A.
o, It was I came to know her.”
B.
in the university
C.
in the university that
D.
in the university where
E.
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