请开始答题
1. 3, 4, 6, 10, 18, ( )
A.34 B.36 C.38 D.40
2.42, 36, 31, 27, 24,( )
A.20 B.18 C.22 D.16
3.16, 18, 21, 26, 33, ( )
A.44 B. 48 C.52 D.56
4.2, 10, 30, 68, 130, ( )
A. 169 B.222 C.181 D.231
A.7.12 B.7.16 C.8.12 D.8.16
数量关系
1-5:ACABD 6-10:CAACC 11-15:BBDDD