A.前者比后者大2倍 B.前者比后者小2倍 C.前者是后者的1/2 D.后者是前者的1/2
A.0.9747% B.0.9645% C.0.9573% D.0.6827%
A.41.4% B.42.4% C.46.8% D.48.8%