A.5.65 B.11.3 C.17.6 D.25.4
A.參考數(shù)據(jù) B.無效數(shù)據(jù) C.有效數(shù)據(jù) D.有用數(shù)據(jù)
A.<150mm B.150-250mm C.>250mm D.無要求