A.65~70 B.60~70 C.100~110 D.105~110
A.3.5% B.3.0% C.4.0% D.5.0%
A.25,50,100,900 B.20,50,100,900 C.20,80,100,900 D.25,80,100,900
A.15%,80%; B.20%,85%; C.20%,80%; D.15%,85%。
A.每周检查一次 B.每旬检查一次 C.每季检查一次 D.每月检查一次