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Recent studies have shown that air into a house often has higher concentrations
Recent studies have shown that air into a house often has higher concentrations
游客
2024-11-18
25
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问题
Recent studies have shown that air into a house often has higher concentrations of contaminants than heavily polluted air outside.
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答案
into—in
解析
译文:最近的研究表明:与室外严重污染的空气相比,室内的空气通常污染物浓度更高。
分析:考查介词。into表示动作的方向,此处表示所处位置应当用介词in。
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