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何谓静态链接、装入时动态链接和运行时动态链接
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什么是存储器的内零头和外零头它们是怎么造成的减少它们应采取什么措施
试述分页存储管理的基本实现原理，并说明如何实现从逻辑空间到物理空间的变换
有一个程序要把100×100的数组置初值“0”，现假定有两个主存块可用来存放数组中的元素，每个主存块可以存放200个数组元素，数组中的元素按行编址。两个主存块的初始状态都为空，若程序编制如下： (1)Var A:array[1..100] of array[1..100] of integer; for j:=1 to 100 do for i=1 to 100 do A[i,j]:=0 (2)Var A:array[1..100] of array[1..100] of integer; for i:=1 to 100 d0 for j:=1 to 100 do A[i,j]:=0 当采用LRU页面调度算法时，对上述两种程序编制方法各会产生多少次缺页中断
What will man be like in the future—in 5,000 or even 50,000 years from now We can only make a guess, of course, but we can be sure that he will be different from what he is today. For man is slowly changing all the time.Let us take an obvious example. Man, even five hundred years ago, was shorter than he is today. Now, on average, men are about three inches taller. Five hundred years is a relatively short period of time, so we may assume that man will continue to grow taller.Again, in the modern world we use our brains a great deal. Even so, we still make use of only about 20% of the brain"s capacity. As time goes on, however, we shall have to use our brains more and more, and eventually we shall need larger ones! This is likely to bring about a physical change too: the head, in particular the forehead, will grow larger.Nowadays our eyes are in constant use. In fact, we use them so much that very often they become weaker and we have to wear glasses. But over very long period of time it is likely that man"s eyes will grow stronger.On the other hand, we tend to make less use of our arms and legs. These, as a result, are likely to grow weaker. At the same time, however, our fingers will grow more sensitive because they are used a great deal in modem life.But what about hair This will probably disappear from the body altogether in course of time because it does not serve a useful purpose any longer. In the future, then, both sexes are likely to be bald!Perhaps all this gives the impression that future man will not be a very attractive creature to look at! This may well be true. All the same, in spite of all these changes, future man will still have a lot in common with us. He will still be a human being, with thoughts and emotions similar to our own. The passage tells us about ______.
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