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Metals expand when they are heated and when cooled. [ ] A.contactB.reduce C.cont

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Metals expand when they are heated and when cooled. [ ] A.contactB.reduce C.cont

Metals expand when they are heated and ________ when cooled.

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A.contactB.reduceC.contractD.contrast

试题答案

答案:

解析:

题意:金属热胀冷缩。contract收缩;缩小,符合题意。