30,15,12,__A.10B.8C.13D.14十五:0.75,065,0.45,___A.0.78B.0.88C.0.55D.0.96十六:9,1,4,3,40,___A.81B.80C.121D.120十七:-1,2,7,28,__,126没有备选答案十八:1/2,2/5,3/10,4/17,___A.4/24B.4/25C.5/26D.7/26十九:3,2,53,32,___A.75B....