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  3. Air is a______(mix), whose components are of great use in the chemical industry.

Air is a______(mix), whose components are of great use in the chemical industry.

admin2007-12-11  67
问题 Air is a______(mix), whose components are of great use in the chemical industry.
选项
答案mixture
解析 本题考查词类转换。从不定冠词a可以判断出空格处应该填名词。mix是动词，意思是“混合、融合”，其名词形式为mixture。
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