A.等于60% B.大于70% C.小于60% D.等于70%
A.6~9之内 B.8~12之内 C.6~12之内 D.5~8之内
A.0.3% B.0.5% C.0.7% D.1.2%
A.1m B.1.5m C.2m D.2.5m