单项选择题
A.0.1~0.2 B.0.01~0.02 C.0.2~0.3 D.0.02~0.03
A.1%~3% B.2%~4% C.3%~5% D.4%~6%
A.60° B.75° C.90° D.120°
A.柱形 B.锥形 C.端面 D.椭圆
微信扫一扫,加关注免费搜题