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【单选题】
在中性点直接接地的电力系统中,发生单相接地故障时,非故障相对地电压( )。(1分)加油!必过!A.
不变
B.
升高
C.
降低
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举一反三
【单选题】In the author's opinion, black English was initially formed in _________.
A.
Congo Square
B.
the black church
C.
the slave market
D.
some African countries
【单选题】--______ man is your English teacher? -- The man in black.
A.
What
B.
Which
C.
Who
D.
Whose
【单选题】In South Africa, English is the language ________ black parents wish their children to be educated.
A.
for which
B.
that
C.
in which
D.
when
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