單項(xiàng)選擇題
A.d B.2d C.3d D.4d
A.2 B.3 C.4 D.5
A.30t B.40t C.50t D.60t
A.7% B.8% C.9% D.10%
A.K B.F C.E D.Z
A.10 B.12 C.14 D.16
A.0.1B.0.2C.0.05D.0.02
A.-50~+50 B.-25~+25 C.0~+50 D.0~25
A.弦與弧外側(cè)最大自然矢高不大于25mm B.弦與弧內(nèi)側(cè)最大自然矢高不大于25mm C.弦與弧中心最大自然矢高不大于25mm D.弦與弧中心最大自然矢高不大于20mm
A.8.74mm B.8.47mm C.8.60mm D.6.50mm