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【单选题】
所谓浅裂缝，系指局限于结构表层，开裂深度不大于( )mm的裂缝。A.
500
B.
600
C.
700
D.
800
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举一反三
【简答题】聚合物、大分子、金属、陶瓷、塑料、橡胶、纤维的英文
【单选题】The Browns usually drive to the park on Sundays. But today they go to the park _____ foot.
A.
in
B.
on
C.
by
【单选题】The Browns usually drive to the park on Sundays. But today they go to the park_____ foot.
A.
in
B.
by
C.
on
D.
of
【单选题】The Browns usually drive to the park on Sundays. But today they go to the park _____ foot.
A.
in
B.
on
C.
by
D.
of
参考解析：
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