分子、原子和离子都是构成物质的基本粒子。下列物质由原子构成的是[ ]
A.氯化钠
B.蒸馏水
C.氮气
D.金刚石
答案:D
–How far apart do they live?
–_____ I know, they live in the same neighborhood.
A.As long as
B.As far as
C.As well as
D.As often as
页面替换算法主要考虑的因素有()
A.高的主存命中率
B.便于实现
C.软件成本低
D.硬件成本低