單項選擇題2,3,5,9,17,( )
A.29
B.31
C.33
D.37
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1.單項選擇題1,1,-1,-5,( )
A.-1
B.-5
C.-9
D.-11
2.單項選擇題4,4,2,-2,( )
A.-2
B.-4
C.-8
D.-16
3.單項選擇題6,18,( ),78,126
A.40
B.42
C.44
D.46
4.單項選擇題-2,-4,6,8,-10,-12,14,16,( ),( )
A.-17,-18
B.17,18
C.-18,-20
D.18,20
5.單項選擇題12,13,15,18,22,( )
A.25
B.27
C.30
D.34