单项选择题
A.相等 B.相反 C.成正比 D.成反比
A.1倍 B.1.73倍 C.2倍 D.3倍
A.75 B.105 C.175 D.825
A.1875mm B.2375mm C.2425mm D.2725mm
微信扫一扫,加关注免费搜题