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【单选题】
三相桥式电压型逆变电路,180°导电方式,Ud=200V,输出相电压基波有效值Uo1为()
A.
45 V
B.
90V
C.
120V
D.
160V
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A.
素线直线度公差
B.
圆度公差
C.
素线直线度公差和圆度公差
D.
角度公差
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A.
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B.
Libraries help educate the kids.
C.
They create a great sense of community.
D.
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E.
Most libraries now have computers and allow people to borrow CDs and DVDs.
F.
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A.
直线度
B.
圆度
C.
圆柱度
D.
同轴度
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直线度
B.
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C.
平行度
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A.
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B.
Maybe it works, maybe it doesn’t.
C.
Only heaven knows whether it works.
D.
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A.
fact(n)函数功能为求n的阶乘
B.
range()函数是Python内置函数
C.
s是局部变量
D.
代码中n是可选参数
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