16.The members of an extended family are ____ by b

16.The members of an extended family are ____ by blood or by marriage.(3分)A. rel

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8、 隧道建筑限界:指包围“________”外部的轮廓线。

8、 隧道建筑限界:指包围“________”外部的轮廓线。

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I.m more than happy to go out this weekend.

I.m more than happy to go out this weekend. —_________________ We.ve got so much

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若D是平面区域﹛1≤χ+y≤2﹜则∫∫Ddxdy=()

若D是平面区域﹛1≤χ+y≤2﹜则∫∫Ddxdy=()A.2πB. πC.3πD.4π

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