A.范围 B.系属 C.连接点 D.准据法
A.260;230~250 B.300;230~250 C.300;253~260 D.350;300~350
A.20 B.22 C.24 D.26
A.80% B.85% C.90% D.93%
A.2 B.5 C.10 D.20