Metals ______ as they grow cool. A.reduce B.condense C.contract D.compress 为什么
问题描述：
Metals ______ as they grow cool. A.reduce B.condense C.contract D.compress 为什么
答
选C 收缩
金属变冷时收缩.
参考例句：热胀冷缩 expand with heat and contract with cold
A 减少
B 使 浓缩,使简洁
D 压缩,指收到外力