A.2.67 B.3.3 C.2.55 D.3.5
A.21.5 B.20.9 C.22.1 D.20.0
A.656 B.632 C.665 D.566
A.646/(324+646+1255+175) B.(646+1255)/(324+646+1255+175) C.646/(646+1255) D.646/1255
A、0.8 B、0.85 C、0.90 D、0.95