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【判断题】
互联网作为一个全球开放的系统，不存在国界，确保互联网可控，使网络空间清朗起来是不可能的。( )A.
正确
B.
错误
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【单选题】Providing adequate public health-care facilities is a crucial task in a county like Travis, where more than 60 percent of household incomes are below the poverty line.
A.
where more than 60 percent of household incomes are
B.
where more than 60 percent of household income is
C.
which has more than 60 percent of the household incomes
D.
where they have more than 60 percent of household income
E.
where more than 60 percent of them have household incomes
参考解析：
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