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“I Love You”Virus
On May 21,1999,some American scientists were working at the computers to look for information they needed.Suddenly they saw a lot of very bright red spots crossing the computers’screens.At the same time the computers were working much slower.To find out what was happening they stopped their work to check some parts of the computers.To their horror,they found out that most of their stored information was got rid of by computer virus! Obviously all these computers had been infected by computer virus.
It is said that the computer virus was made by two or three Philippine young men fond of playing tricks.They all had excellent education.They created the virus just to show their intelligence.The kind of computer virus is named“I Love You”Virus.This virus can hide in computers for long.When the time comes it will attack the computers by lowering the important functions,damaging their normal programs or even getting rid of a great deal of information which operators of the computers often use or store;even worse,it still can reproduce itself in great quantities within a short time.
We come to know that “I Love You”Virus often attacks computers on Mondays and that it is spreading to many computers in the world.Among the countries that suffered computer viruses last year are Britain,Australia,Switzerland and the US.Those who made the computer viruses have been found out slowly and carefully.But till now,how to get rid of the terrible viruses remains a problem.
61.In 1999,the virus made American scientists’information______.
A.all lost B.partly lost C.none lost D.mostly lost
62.The most terrible character“I Love You”Virus is______.
A.it can hide in computers for long
B.it can damage computer’s normal programs
C.it can get rid of all the information that the operator stores
D.it can reproduce itself in great quantities in a short time
63.All the following countries have been attacked by“I Love You”Virus EXCEPT______.
A.Britain B.Australia C.Switzerland D.Japan
64.According to the passage,which is NOT true about“I Love You”Virus?
A.Have found who made it B.Have found the solution to it
C.Have been attacked by it D.Have no effective method to it
查看习题详情和答案>>On October 12, 1989, some British scientists were working at the computers to look for the information they needed. Suddenly they saw a lot of very bright points crossing the computers’ screens. At the same time the computers were working much slower. To find out what was happening they stopped their work to check some parts of the computers. To their horror (恐怖), they found out that most of their stored information was got rid of by computer viruses (病毒) ! Clearly all these computers had been infected (感染) by computer viruses.
It is said that the computer viruses were made by a group of young men fond of playing tricks. They all had excellent education. They created the viruses just to show their intelligence (才能) . These kinds of computer viruses are named Jerusalem Viruses. These viruses can stay in computers for a long time. When the time comes they will attack the computers by lowering the functions , damaging their normal programs or even getting rid of all the information.
We now come to know that Jerusalem Viruses often attack computers on Friday and that they are spreading (传播) to a lot of computers. Among the countries that were attacked by computer viruses last year are Britain, Australia, Switzerland and the U.S. But till now, how to get rid of the terrible viruses remains a problem.
根据文章内容，选择正确答案：
77. When the viruses attack the computers, the computers will work____ .
A. normally B. slowly C. faster D. well
78. The group of young men created the viruses to ____ .
A. damage the computers
B. test their ability
C. tell people that they were intelligent
D. play a trick on users of the computers
79. According to the passage, computer viruses seem to ____.
A. have been in nature for years
B. stay in any computers
C. be difficult to get rid of at present
D. be able to be got rid of in the near future
80. According to the passage, which of the following is TRUE?
A. Last year four countries found their computer were infected by viruses.
B. The viruses will come to a new computer after staying in the old one for some time.
C. Scientists are trying to find a way to get rid of the viruses.
D. The Jerusalem Viruses are dangerous to human health.
查看习题详情和答案>>On October 12, 1989, some British scientists were working at the computers to look for the information they needed. Suddenly they saw a lot of very bright points crossing the computers screens. At the same time the computers were working much slower. To find out what was happening they stopped their work to check some parts of the computers. To their horror (恐怖), they found out that most of their stored information was got rid of by computer viruses (病毒) ! Clearly all these computers had been infected (感染) by computer viruses.
It is said that the computer viruses were made by a group of young men fond of playing jokes. They all had excellent education. They created the viruses just to show their intelligence . .These kinds of computer viruses are named Jerusalem Viruses. These viruses can stay in computers for a long time. When the time comes they will attack the computers by lowering the functions , damaging their normal programs or even getting rid of all the information. We now come to know that Jerusalem Viruses often attack computers on Friday and that they are spreading to a lot of computers.
Among the countries that were attacked by computer viruses last year are Britain, Australia, Switzerland and the U.S. But till now, how to get rid of the terrible viruses remains a problem.
67. When the viruses attack the computers, the computers will work____ .
A. normally B. slowly C. faster D. well
68. The group of young men created the viruses to ____ .
A. damage the computers B. test their ability
C. tell people that they were intelligent D. play a trick on users of the computers
69. According to the passage, computer viruses seem to ____.
A. have been in nature for years B. stay in any computers
C. be difficult to get rid of at present D. be able to be got rid of in the near future
70. According to the passage, which of the following is TRUE
A. Last year four countries found their computer were infected by viruses.
B. The viruses will come to a new computer after staying in the old one for some time.
C. Scientists are trying to find a way to get rid of the viruses.
D.The Jerusalem Viruses are dangerous to human health.
查看习题详情和答案>>Scientist Florence Wambugu works with farmers in Kenya, a country in East Africa. She helps them grow bigger and better crops. Wambugu is especially interested in finding simple ways to produce more food.
In the past ten years, Wambugu has spent much of her time studying sweet potatoes, which are an important food in her part of Kenya. A virus kept attacking the plants. It stopped the sweet potatoes from growing well. Because of the virus, some farmers lost three quarters of their crops.
Wamugu went to war against the virus. Her search for a way to save the sweet potatoes led to a lab in St.Louis, Missouri.
The lab mainly works on genes, the chemical “computer programs” found in the cells of living things. Genes tell a plant to produce pink flowers or an animal to grow black hair. Now scientists have found ways to move genes from one living thing to another. That process is called genetic engineering.
Wambugu spent three years in the lab. As a result, she created a sweet potato plant that could fight off the virus. Wambugu tested her research in Kenya, and her plants produced wonderful sweet potatoes.
That’s just the beginning, Wambugu believes. Genetically modified foods, she thinks, could help farmers in poor countries grow badly needed crops, thus, fewer people will go hungry.
41. The text is written mainly to _________
A. tell us sweet potatoes are in danger of being attacked by virus
B. introduce Wambugu’s contribution to genetic engineering
C.introduce a new way of killing plant viruses
D. tell how hard Wambugu worked in her lab for three years
42. What caused Wambugu to set up a lab in St. Louis, Missouri?
A. Her wish to save sweet potatoes in Kenya.
B. Her great interest in genetic engineering.
C. Her love for sweet potatoes.
D. Her interest in plant life.
43. The fourth paragraph mainly explains what _________is.
A. a crop virus B. chemical technology
C. a computer program D. genetic engineering
44. What is Wambugu’s attitude toward “genetic engineering”?
A. It will help more hungry people.
B. It should be carefully used.
C. It has more disadvantages than advantages.
D. It is a too expensive technology at present.
45. According to the passage, which of the following is NOT true?
A. Florence Wambugu often helps farmers with their work.
B. Florence Wambugu has studied sweet potatoes for 10 years.
C. Genes can be moved from one thing to another.
D. Florence Wambugu has succeeded in creating genetically modified sweet potatoes.
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