单项选择题
A.20 B.5 C.10 D.25
A.10 B.5 C.15 D.25
A.15 B.20 C.10 D.25
A.20 B.15 C.10 D.25
A.10 B.5 C.20 D.3
A.2 B.1 C.3 D.4
A.150 B.120 C.170 D.200
A.250 B.150 C.170 D.200
A.120 B.150 C.170 D.90
A.78% B.50% C.55% D.65%
A.80% B.50% C.55% D.65%