玩一把。:-)
1) 2, 3/2, 10/9, 7/8, 18/25, ?
A.5/14 B. 11/18 C. 13/27 D.26/49
Ans:B
2) 2, 4, 6, 9, 13, 19, ?
A.28 B.29 C.30 D.31
Ans:A
3) -2, 1/2, 4, 2, 16, ?
A. 32 B. 64 C. 128 D.256
Ans:D
4) 21, 28, 33, 42, 43, 60, ?
A. 45 B. 56 C.75 D.92
Ans:C
5) 1, 3, 0, 6, 10, 9, ?
A.13 B.14 C.15 D.17
Ans:D