A.一次 B.二次 C.三次 D.不允许
A.5% B.10% C.15% D.21%
A.0.3mm B.0.5mm C.1mm D.1.5mm
A.440.9 B.464.53 C.723.12 D.730.98
A.279 B.293 C.310 D.326
A.As1:3s2:318 B.As1:3s2:320 C.As1:3s2:322 D.前三项均不满足规程的构造要求