为了对计算机程序变更进行内部控制，应该建立一个政策，要求（）。
A.设计变更的程序员应该负责确保修改的程序进行了充分的测试
B.所有程序变更都由IT控制小组进行监督
C.为了提高运行性能，被替代的程序部分不应该从程序运行手册中删除
D.所有提议的变更应该由负责人批准并进行记录
参考答案：D
解析：
这个控制防止个人进行未授权的程序变更。选项(a)不正确，因为应该是其他人而不是程序员测试程序变更。选项(b)不正确，因为程序变更不是控制小组的责任。选项(c)不正确，因为程序的所有历史信息不会提高运行性能。
| 阅读理解。 | ||||
| Long long ago, when the great library of Alexandria burned, one book was saved. But it was not a valuable book, so a 1 man, who could read a little, bought it for a few coins. The book 2 very interesting, but between its pages there was something very interesting indeed. It was about the secret of the "Touchstone (试金石)"! The touchstone was a small pebble (鹅卵石) that could 3 any common metal into pure gold. The writing explained that it was 4 among thousands and thousands of other pebbles that looked exactly like it. But the 5 was this; The real stone would feel warm, while ordinary pebbles were 6 . So the man sold his few belongs, bought some simple supplies, camped on the beach, and began 7 pebbles. He knew that if he picked up common pebbles and threw 8 down again, he might pick up the same pebble hundreds of times. So, when he felt one that was cold, he threw it into the sea. He spent a whole day 9 this, but none of them was the touchstone. Yet he went on and on this way. Pick up a pebble. Cold-throw; it into the sea. Pick up 10 Cold-throw it into the sea. The days stretched into weeks and the weeks into months and the months 11 years. One day, however, about mid-afternoon, he picked up a pebble and it was warm. He threw it into the sea 12 he realized what he had done. He had formed 13 a strong habit of throwing each pebble into the sea that when the one he wanted came along, he 14 threw it away. So it is with chance. 15 we don't pay enough attention, it is easy to miss a chance when it is in hand and it's just as easy to throw it away. | ||||
|