We like to read the book ______ .
A.subject of which we know well
B.its subject we know well
C.whose subject we are familiar with
D.whose subject we are familiar
第4题
施工现场用电工程中,PE线上每处重复接地的接地电阻值不应大于()。
A.4Ω
B.10Ω
C.30Ω
D.100Ω
第5题
施工现场用电工程中,PE线上每处重复接地电阻值不应大于()
A.4Ω
B.10Ω
C.30Ω
D.100Ω
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