单项选择题
A.32B.33C.34D.35E.36F.37G.38H.39
A.5B.6C.7D.8
A.10B.11C.12D.13
A.7B.26C.28D.29
A.P1=P2B.P1>P2C.P1<P2D.无法确定
A.4/45B.2/45C.1/45D.1/90
A.20B.10C.15D.16
A.1/3B.1/6C.1/9D.1/27
A.25%-35%B.高于35%C.低于15%D.15%-25%
A.1/4B.3/8C.1/2D.5/8
A.1/5B.2/5C.3/4D.3/10