-1 ,2,11 ,38,( )。
A. 119 B. 133 C. 121 D. 117
7,7,9,17,43,()A119 B117 C123 D121
:5 12 21 34 53 80 () A.121B.115C.119D.117
:7 7 9 17 43 () A.119B.117C.123D.121
51221345380 () A.121B.115C.119D.117
7791743() A.119B.117C.123D.121
5,12,2l,34,53,80,() A.115B.117C.119D.121