119×121的值为()。
A.14600
B.14399
C.16700
D.18670
119~121 题共用备选答案。 A.亲脂性很强的香豆素B.极性较大的
5,12,21,34,53,80,()A.121 B.115 C.119 D.117
5,12,21,34,53,80,() A.115 B.117 C.119 D.121
5,12,2l,34,53,80,() A.115 B.117 C.119 D.121
5 12 21 34 53 80 ( ) A.121 B.115 C.119 D.117
7 7 9 17 43 ( ) A.119 B.117 C.123 D.121