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【简答题】
力偶矩的（）、转向和作用平面称为力偶的三要素。
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反馈参考答案：
举一反三
【单选题】Two-thirds of the land ________ covered with green grass and the rest _______ covered with pine trees.
A.
is; is
B.
is; are
C.
are; is
D.
are; are
【单选题】How are the minority groups covered in British news media?
A.
They are scarcely covered in any news media.
B.
They are widely covered in all kinds of news media.
C.
They are covered only in some special programs and tabloids.
D.
They are covered only in some mainstream TV programs and big newspapers.
【单选题】Since last year, she ______ of the long distance.
A.
have covered three fifth
B.
have covered three fifths
C.
has covered three fifths
D.
has covered three fifth
【单选题】The path in the park looked beautiful, _______ with_______leaves.
A.
covered;falling
B.
covered;fallen
C.
covering;falling
D.
covering,fallen
【简答题】How is the food finally covered? It is covered with a piece of ______.
【单选题】About seventy percent of the earth with water.
A.
is covering
B.
is covered
C.
are covering
D.
are covered
【单选题】When we woke up, everywhere was ______ snow.
A.
covered
B.
covered in
C.
covered with
D.
covering
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