再循环设计和拆装设计都是基于人类对（）的考虑所形成的设计方式。
A.社会公平
B.缩小贫富差距
C.环境保护
D.市场竞争
参考答案：C
It was his courage, not his skill, really struck me most
A．When
B．Where
C．Which
D．That
弹性回跳说
