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【单选题】
力矩的单位为（）A.
N·m 2
B.
N／m
C.
N·m
D.
N 2 ·m
E.
N／m 2
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反馈参考答案：
举一反三
【单选题】The girl is ____ a nice girl ____ we all want to help her.
A.
such; that
B.
too; to
C.
so; that
D.
very; that
【简答题】提高功率因数的意义有哪些?
【单选题】Do you know ______________ had reported the accident to the police?
A.
who it was that
B.
who was it that
C.
it was who that
D.
that it was who
【简答题】提高功率因数的意义有哪些?
【简答题】提高功率因数的意义有哪些？
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