填空题：Though marriage __________ (practice) in almost all countrie

题目内容：

Though marriage __________ (practice) in almost all countries of the world, the customs are quite different from one culture to another.

参考答案：

答案解析：

In the program title "America's Most Wanted"( Line 1, Para.

In the program title "America's Most Wanted"( Line 1, Para. 3 ) , "most wanted"

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The head of government of Canada is represented byA． the Quee B． the Prime Minis

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The traditional view that men are superior __________ women still exists in some

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设A、B为同阶矩阵，且A、B等价，则（　　）A．r(A)＝r(B) B．A、B有相同的特征多项式 C．|A|＝|B| D．A、B合同

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