2,12,30,56,90,()
A.136
B.132
C.128
D.126
2, 12, 30, 56, ()。 ’A.80 B.76 C.90 D.100
22,35,56,90,(),234 A.167 B.156 C.128 D.145
2,12,30,56,(),132。 A.72 B.90 C.10 D.80
22, 35, 56, 90, (), 234。A. 167 B. 156C. 128 D. 145
2,12,(),56,90。A.54B.30C.22D.18