4、Metal _____ when cooled and expands when heated.A.decreases B.reduces C.condenses D.contracts
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4、Metal _____ when cooled and expands when heated.A.decreases B.reduces C.condenses D.contracts
4、Metal _____ when cooled and expands when heated.
A.decreases
B.reduces
C.condenses
D.contracts
4、Metal _____ when cooled and expands when heated.A.decreases B.reduces C.condenses D.contracts
contracts是缩小
分析一下几个词的意思:decreases和reduces都是减少之意,不合适,condenses是浓缩之意,也不合适,只有contract有收缩之意,所以答案是D
这句话是说:金属会热胀冷缩
B
d