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

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