Computer criminals don't use guns. And even if they are caught, it is hard to punish them because there are no witnesses and often no evidence. A computer cannot remember who used it, it simply does what it is told. The head teller at a New York City Bank used a computer to steal more than one and a half billion dollars in just four years. No one noticed this theft because he moved the money from one account to another. Each time a customer he had robbed questioned the balance in his account, the teller claimed a computer error, then replaced the missing money from someone else's account. This man was caught only because he was a gambler. When the police broke up an illegal gambling operation, his name was in the records.
Some employees use the computer's power to get revenge on employers they consider unfair. Recently, a large insurance company fired its computer-tape librarian for reasons that involved her personal rather than her professional life. She was given thirty days' notice. In those thirty days, she erased all the company's computerized records.
Most computer criminals have been minor employees. Now police wonder if this is "the tip of the iceberg". As one official says, "I have the feeling that there is more crime out there than we are catching. What we are seeing now is all so poorly done. I wonder what the real experts are doing—the ones who really know how a computer works. "
The passage is mainly about
A.computer crimes
B.banking via computer
C.computer errors
D.computer businesses
第3题
下列类型中,不适用于数值常量类型的是 ______。
A.货币型
B.单精度型
C.整型
D.长整型
第5题
用一个变量来存储跳高比赛成绩,单位为“米”,则该变量的数据类型应声明为()。
A.整型
B.单精度类型
C.逻辑型
D.日期型
第6题
根据用户对变量的定义,在VBScript中变量有整型、字节型、日期型等多种数据类型。()
第7题
A.字节型、整型、长整型、单精度
B.整型、字节型、单精度、双精度
C.长整型、整型、单精度、双精度
D.整型、长整型、双精度、单精度
第9题
下列选项中不能参与数据运算的变量类型是______。
A.屏幕型
B.字符型
C.逻辑型
D.日期型
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