A.6.5%,5.5%,3.5% B.10%,7.0%,5.5% C.7.0%,5.0%,2.0% D.7.0%,5.5%,3.5%
A.不宜 B.應(yīng) C.不得 D.必須
A.不應(yīng) B.必須 C.不宜 D.—般不