【例题】-26,-6, 2, 4, 6, ( )
A.11 B.12 C.13 D.14
【例题】456,369,457,356,458,343,459,330,( )
A.317 B.325 C.453 D.460
【例题】122,101,82,65,( )
A.60 B.50 C.40 D.30
【例题】3, 3, 4, 8, 5, 15, ( ),( )
A.6,24 B.6,20 C.4,16 D.4,18
【例题】1944,108,18,6,( )
A.5 B.4 C.3 D.1
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