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.

（53）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

我国近期在南海海底发现了一种俗称 "可燃冰"的冰块状天然气水合物，能源总量可达全国石油总量的一半，燃烧1m³，可燃冰释放出的能量与燃烧164m³天然气释放的能量相当，由此可判断"可燃冰"[ ]

A.具有较高的内能

B.具有很高的化学能

C.只有燃烧时才有内能

D.没点燃时只具有化学能