单项选择题
A.180mm;360mm B.180mm;365mm C.178mm;360mm D.178mm;365mm
A.120mm B.115mm C.110mm D.125mm
A.2.6 B.2.4 C.2.2 D.2.0
A.180 B.160 C.120 D.100
A.平面B.斜面C.凹曲面D.凸面
A.3.00hB.4.00hC.5.50hD.7.00h
A.50~100B.80~150C.25~50D.15~25