(1)12,6,6,9,(),45A12B15C18D21回答:C.12*1/2=66*2/2=66*3/2=99*4/2=1818*5/2=45注:分母相同,分子+1(2)0,10,24,50,()A64,110B80,122C64,120D49,111回答:B.0=1²-110=3²+124=5²-150=7²+180=9²-1122=11²+1注:1,3,5,7,9,11差均为2(3)0,-1,2,(),82A13B15C17D19回答:B.0的4次方-1=-11的4次方+1=22的4次方-1=153的4次方+1=82(4)28,29,31,34,39,(),57A40B42C44D46回答:D.28+1=2929+2=3131+3=3434+5=3939+7=4646+11=57注:1,2,3,5,7,11除了1和本身之外无约数(5)11,22,33,45,(),71A50B53C57D61回答:C.11=10+122=20+233=30+345=40+557=50+771=60+11注:同上题.1,2,3,5,7,11除了1和本身之外无约数