下面概念中,不属于面向对象方法的是______。
A.对象
B.继承
C.类
D.过程调用
参考答案:D
______ the direction of the experienced experts, they successfully carried out the experiment. [ ]
A. With
B. By
C. In
D. Under
tRNA的3’端结构是().
A.GPPPmG结构
B.多聚A结构
C.hnRNA
D.假尿嘧啶核苷
E.CCA—OH结构