题目内容
Computer science__________(teach)now almost in all universities and institutes.
is taught
On October 12, 1989, some Chinese scientists were working at the computers to look for information they needed. Suddenly they saw a lot of very bright spots crossing the computers’s 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 viruses ! Obviously all these computers had been infected 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 . These kinds of computer viruses are named Jerusalem（耶路撒冷）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 Fridays and that they are spreading to a lot of computers. Among the countries that suffered computer viruses last year are Britain, Australia, Switzerland and the U.S. But fill now , how to get rid of the terrible viruses remains a problem.
【小题1】The group of young men created the virus to________.
| A．damage the computers |
| B．test their ability |
| C．tell the world that they were intelligent |
| D．play a trick on operators of the computers |
| A．have been in nature for years |
| B．exist in any computers |
| C．be difficult to get rid of at present |
| D．be able to be got rid of in the near future |
| A．the computer’s functions are lowered |
| B．the normal programs are damaged |
| C．all the information stored in the computers is gone |
| D．the computers infected by the viruses can no longer be used |
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Do you constantly use the computer, whether for learning or entertainment? Computers give off radiation that is bad for your health, but here are some ways to protect yourself from computer radiation.
1. . Green tea can be absorbed by the body easily into a form of vitamin A, which helps reduce radiation. 2.
It is advisable to attach a radiation filter plate （辐射过滤板） in front of your computer’s screen. Make sure to avoid putting any metal substances near your computer as these may have reflected some of the electromagnetic waves that are harmful to your health. 3. The brighter the screen the higher the radiation there will be and vice versa.
You can also put some radiation-absorbing plants such as several cacti (仙人掌)near your computer to prevent radiation.
Make sure you do a skincare protection before sitting in front of the computer. 4. Wash your face soon after using the computer in order to reduce 70% of the radiation.
_5. Old computer in general, has one to two times more radiations released than the new one within the same distance.
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A．And adjust the brightness of your computer screen. |
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B．Apply a layer of facial mask to protect yourself. |
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C．And adjust the sound level on your computer. |
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D．The most efficient way is by drinking some coffee regularly. |
E. The simplest way is by drinking 2 & 3 cups of green tea every day.
F. If possible, purchase a new computer instead of using an old model computer.
G. It also helps keep our eyes see things clearly in the dark by improving the visual ability.