單項選擇題12,4,8,6,7,()
A.6
B.6.5
C.7
D.8
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1.單項選擇題-2,3,-1,5,3,13,()
A.21
B.28
C.18
D.19
2.單項選擇題2,6,15,30,45,()
A.63
B.57
C.51
D.45
3.單項選擇題3,13,53,129,247,()
A.413
B.365
C.498
D.516
4.單項選擇題44,52,68,76,92,()
A.104
B.116
C.124
D.128
5.單項選擇題2,-2,6,-10,22,()
A.-36
B.-40
C.-42
D.46