【判断题】【消耗次数：1】
MP3文件格式是Windows所使用的标准数字音频文件格式。
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正确
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错误
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The air became_________ .
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cold and cold
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colder and colder
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warm and warm
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Many young adults, who have had no_________ to receive further education before, are eager to develop their abilities.
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skill
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opportunity
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run
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ran
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what
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which
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Various_________ are offered in adult educational institutions.
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courses
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cases
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mails
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【判断题】
<img src=http://p.ananas.chaoxing.com/star3/origin/44ee0085c9af58bc60f06911bcbd9b31.png/>
①
正确
②
错误