In object-oriented (51) , objects can be viewed as reusable components, and once the programmer has developed a (52) of these components, he can (53) the amount of new coding required. But (52) a (54) is no simple task because the integrity of the Original software design is critical. Reusability can be a mixed blessing for user, too, as a programmer has to be able to find the object he needs. But if (55) is your aim, reusability is worth the risk.

（54）是（）

A.complexity

B.creating

C.indisposing

D.library

E.maximize

F.minimize

G.reading

H.procedure

I.productivity

J.programming

K.security

L.using

下列案例中哪一项成立犯罪未遂( )

A．甲对胡某实施诈骗行为，被胡某识破骗局。但胡某觉得甲穷困潦倒，实在可怜，就给其3000元钱，甲得款后离开现场
B．乙为了杀死刘某，持枪尾随刘某，行至偏僻处时，乙向刘某开了一枪，没有打中；在还可以继续开枪的情况下，乙害怕受刑罚处罚，没有继续开枪
C．丙绑架赵某，并要求其亲属交付100万元。在提出勒索要求后，丙害怕受刑罚处罚，将赵某释放
D．丁抓住妇女李某的手腕，欲绑架李某然后出卖。李为脱身，便假装说：“我有性病，不会有人要。”丁信以为真，于是垂头丧气地离开现场