单选题：Intermarriage and different occupations play an important ro

题目内容：

Intermarriage and different occupations play an important role in family disorganizati on because __________.

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According to the passage, those who live in a traditional fa

According to the passage, those who live in a traditional family __________.

分类：英语四级题型：单选题

分类：英语四级题型：单选题

当有电流在接地点流人地下时，电流在接地点周围土壤中产生电压降。人在接地点周围，两脚之间出现的电压称为__________。

分类：英语四级题型：单选题

分类：英语四级题型：单选题

分类：英语四级题型：单选题