Q3
21, 20, 18, 15, 11, ?
请帮忙给出正确答案和分析,谢谢!
阅读下列FORTRANN77程序:INTEGERB(4,5)DATAB/11,20,15,1,9,12,18,2,6,8,*10,3,22,15,21,3,17,9,3
21, 20, 18, 15, 11 , ___
31 29 23()17 13 11 A.21B.20C.19D.18
31,29,23,(),17,13,11。 A.21B.20C.19D.18
31,29,23,(),17,13,11A.21B.20C.19D.18
11 21 15 18 19 15 23 ()。A. 21 B. 12C.25 D.30