A.直徑為100mm B.直徑75mm C.高徑比1︰1 D.高徑比介于0.95與1.05之間
A.5s B.10s C.15s D.20s E.25s F.35s
A.0.3 B.0.4 C.0.5
A.4 B.5 C.6 D.7
A.-1 B.0 C.1