更多"To fight against computer crimes, a"的相关试题:
[单项选择] To fight against computer crimes, a computer system needs a sure way of identifying its right users and rejecting those who are not entitled to use it. The identification system should be quick, simple, and convenient.
At present, signatures are widely used to identify credit card holders, but it takes an expert to detect a good forgery. Sometimes even a human expert is fooled, and there is no reason to believe that a computer could do any better.
Photographs are also sometimes used for identification. But, people find it inconvenient to stop by a credit-card company and to be photographed. Companies might lose business if they made the pictures under absolute requirement. Also, photographs are less useful these days, when people frequently change their appearance by changing the way they wear their hair. Finally, computer programs for analyzing photographs are still highly experimental.
Cash-drawing systems often use two identification numbers: One is recorded on a
A. Convenience.
B. Reliability.
C. Low costs.
D. Acceptability.
[单项选择]What has created opportunities for computer crimes
A. The increased production of computers.
B. The skillful operation of computers.
C. The increasing number of people using computers.
D. The availability of computer networks.
[填空题]Computer crimes are on the rise because more cheap microcomputers are available.
[填空题]Many companies don’t report computer crimes because law procedures against computer crimes usually cost a lot of money.
[填空题]According to the passage, ’computer crimes has been on the rise for the last ______ years.
[填空题]The fight against AIDS got some more help earlier this month. The Swiss drug manufacturer Roche and the Clinton Foundation announced separate efforts to provide H. I. V. drugs to poor nations.
Roche says it will provide drug companies in developing nations with {{U}} (36) {{/U}} assistance to make copies of a drag called saquinavir. Saquinavir is taken in {{U}} (37) {{/U}} with other medicines. It is used to treat H. I. V. patients with or without AIDS.
H. I. V. is the virus that develops into AIDS. {{U}} (38) {{/U}} lose their ability to fight infections. For example, many people with AIDS die of tuberculosis (肺结核).
Roche says it plans to start its technology {{U}} (39) {{/U}}program in more than sixty nations, mostly in Africa and Asia. Officials say the countries {{U}} (40) {{/U}} about seventy percent of all people living with H. I. V. and AIDS. Medical experts say more than forty million people are infected around the world.
Roche says it will have a special