题目
题型：同步题难度：来源：
information they needed. Suddenly they saw a lot of very bright spots (点) 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 (恐惧), they found out that most of their stored information was got rid of (除掉)
by computer viruses! Obviously 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 man fond of playing
tricks. They all had excellent education. They created the viruses just to show their
intelligence. (才智) 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 function (功能), 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 (传播) to a list of computers. Among the countries that suffering
computer viruses are Britain, Australia, Switzerland and the U.S. But till now, how to
get rid of the terrible remains a problem.
B. test their ability
C. tell the world that they were intelligent
D. play a trick on operators of the computers
B. exist (存在) in any computers
C. be difficult to get rid of at present
D. be able to be got rid of in the near future
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
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 a great harm to human health.
答案
核心考点
试题【阅读理解。 On October 12, 1987, some Chinese scientists were working at the comput】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
lions live in big forest and they are called 1 animals. Some others like sheep and
dogs are 2 by men and they are called domestic (驯养) animals. These animals are very
different from one another, but we can 3 them into big groups: those that eat other
animals and those that eat grass and leaves. Animals like the 4 belong to the first
group. Animals like cows, elephants and horses belong to the second group.
Animals are 5 great use to human beings. Men 6 wild animals for their fur and
meat. Domestic animals are 7 more important to men. Without them, life will be 8 .
People make use of animals in many 9 .
Cows and pigs are useful to men"s 10 . They give 80% of the 11 men eat every year.
Skin of some animals can be 12 into expensive overcoats and shoes, which are warm and
comfortable and 13 a long time. They are very welcome in 14 countries. Wool, which is
now one of the most important material for textile (纺织) 15 , comes from a special kind
of 16 . From cows, we get milk. And we shouldn"t 17 that some domestic animals are kept
for transport. Many people 18 ride horses. Arabs ride on camels which travel in deserts
for days without 19 . In some places animals are still used to plough field. 20 is clear
that men just can"t live without these animals.
| ( )1. A. wild ( )2. A. trapped ( )3. A. separate ( )4. A. chicken ( )5. A. with ( )6. A. hunt ( )7. A. quite ( )8. A. smooth ( )9. A. ways ( )10. A. life ( )11. A. meal ( )12. A. put ( )13. A. last ( )14. A. cool ( )15. A. business ( )16. A. sheep ( )17. A. forget ( )18. A. always ( )19. A. resting ( )20. A. That | B. serious B. treated B. divide B. tiger B. to B. discover B. every B. difficult B. groups B. work B. meat B. turned B. cost B. cold B. workers B. dogs B. remember B. hardly B. drinking B. This | C. terrible C. sold C. sell C. fish C. for C. raise C. even C. easy C. places C. family C. dinner C. made C. take C. warm C. industry C. cows C. realize C. still C. sleeping C. It | D. fighting D. kept D. keep D. goat D. of D. care for D. some D. perfect D. kinds D. food D. animals D. changed D. dress D. foreign D. factory D. pigs D. notice D. just D. stopping D. So |
| 阅读理解。 | |||
| Why don"t birds get lost on their long migratory (迁居的) flights? Scientists have puzzled over this question for many years. Now they"re beginning to fill in the blanks. Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly mainly by night? Tests with artificial (人 造的) stars have proved conclusively that certain night-flying birds are able to follow the stars in their long-distance flights. One such bird-a warbler (鸣禽)-had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird"s cage was placed under an artificial star-filled sky at migration time. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the direction of the make-be-live stars caused a change in the direction of his flight. Scientists think that warblers, when flying in daylight, use the sun for guidance. But the stars are apparently their principal means of navigation (导航). What do they do when the stars are hidden by clouds? Apparently, they find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it"s too dark to see these, the warblers circle helplessly, unable to get their direction. | |||
| 1. The reasons why birds don"t get lost on migratory flights _____. | |||
| [ ] | |||
| A. have been known to scientists for many years B. have only recently been discovered C. are known by everyone D. will probably remain a mystery | |||
| 2. Warblers migrate _____. | |||
| [ ] | |||
| A. from North America to South America B. only once during their lifetime C. using what is apparently an inborn navigational ability D. when they are freed from their cages | |||
| 3. When the stars are hidden by clouds, warblers find their way by _____. | |||
| [ ] | |||
| A. an artificial star B. their inborn ability C. some landmarks D. wind | |||
| 4. This article is a good example of the way scientists _____. | |||
| [ ] | |||
| A. jump to conclusions B. discover workable (可行的) answers to general questions by studying particular cases C. find a law and then investigate (调查) D. are disappointed by the habits of animals | |||
| 阅读理解。 | |||
| Animals like the lion are known as carnivorous (meat-eating) animals. They feed on smaller animals. But many other animals eat grass or plants. They are called herbivorous (plant-eating) animals. You may be surprised to learn that there are carnivorous plants as well as carnivorous animals. Plants that grow in poor soil need other food. They trap (catch by a trick) small insects (昆虫) and take their bodies as food. The pitcher plant (猪笼草) is a common carnivorous plant. This plant has a clever trap like a pitcher or jar. It even has a lid to keep out of the rain. The mouth of the pitcher is covered with something sweet like honeydew (蜜露). Insects come to the plant to feed on the honeydew. When they have eaten all that is round the mouth, they go into the pitcher to look for more. There is more honeydew deep in the pitcher and they go down to feed on it. The inner (里面的) wall of the pitcher is covered with fine hairs. These hairs point downwards so that the insects cannot climb out of the pitcher. They are trapped in it. They die there, and their bodies are taken as food by the plant. | |||
| 1. Animals are divided into two kinds _____. | |||
| [ ] | |||
| A. carnivorous animals and meat-eating animals B. herbivorous animals and plant-eating animals C. carnivorous animals and herbivorous animals D. meat animals and plant animals | |||
| 2. The pitcher plant uses _____ to catch insects. | |||
| [ ] | |||
| A. a trap like a pitcher or jar B. something sweet like honeydew C. downward-pointing hairs in the inner wall D. all of the above | |||
| 3. Which of the following is NOT true? | |||
| [ ] | |||
| A. Tigers, lions and other meat-eating animals are called carnivorous animals. B. Zebras, elephants and common farm animals are known as herbivorous animals. C. All plants get food only from the soil. D. It is something like honeydew in the pitcher that insects come to food on. | |||
| 4. From this passage, we can mainly learn that _____. | |||
| [ ] | |||
| A. Not all plants are carnivorous B. All plants are herbivorous C. Not all animals are carnivorous D. Carnivorous plants can also be found | |||
| 阅读理解。 | |||
| The new iPhone 3G should please everyone. Its look and feel are only slightly improved, but a faster network loads Web pages more quickly, true GPS functionality allows it to easily find places nearby, and the new $199 price (down from $400) makes it an affordable luxury. Before deciding whether to buy, however, make sure you can actually take advantage of the iPhone 3G"s high-speed data network. 3G stands for third-generation, which in non-geek speak translates to Web pages and mail messages that, ideally, load about three times faster than on the original iPhone. Even better, 3G coverage enables you to make a phone call and surf the Web at the same time. That"s great, if you live or work in a place where the 3G network of AT&T (美国电话电报公司) (the sole wireless carrier of the iPhone) is active. That"s not so great in cities like New York where AT&T"s cellular coverage is awful. As one of my colleagues in New York City, who bought the original iPhone, commented, "It"s just a toy. You can"t make phone calls on it, so I carry my Verizon phone with me all the time." The real fun begins when you tap on the icon called "App Store" and start browsing the hundreds of add-on applications that have been developed just for the iPhone. You"ll find tons of games (I like JirboBreak, a free game inspired by the Atari classic Breakout) and mobile versions of popular websites like Pandora, Facebook, MySpace and the New York Times. Most apps will cost you, but the vast majority are $9.99 or less. The apps work on the old iPhones too, but you"ll enjoy them a lot more on the iPhone 3G because many of the programs, including Yelp (local business reviews), Whrrl (mobile social networking) and UrbanSpoon (restaurant reviews), use your exact location- provided by the iPhone 3G"s GPS chip-to make recommendations. The apps also load much faster over the 3G network. | |||
| 1. The new iPhone 3G has following features except that _____. | |||
| [ ] | |||
| A. It looks and feels better B. It has a faster network C. It is easy to locate a place D. It is too expensive for people to buy | |||
| 2. Why do one of my colleagues carry Verizon phone with him all the time? | |||
| [ ] | |||
| A. Because iPhone 3G is just a toy. B. ecause he prefers Verizon phone better. C. Because AT&T"s cellular coverage is terrible there. D. Because Verizon phone enables him make a phone call and surf the Web at the same time. | |||
| 3. Which of the following statements is NOT true according to the passage. | |||
| [ ] | |||
| A. App Store will offer you great fun. B. many apps have been developed for the iPhone. C. Most apps are very expensive. D. Pandora, Facebook, MySpace and the New York Times are popular websites. | |||
| 4. From the passage we know that the attitude of the author toward iPhone 3G is _____. | |||
| [ ] | |||
| A. doubtful B. appreciative C. optimistic D. pessimistic | |||
| 阅读理解。 | |||
| Birds that are half-asleep-with one brain hemisphere (半球) alert and the other sleeping-control which side of the brain remains awake, according to a new study of sleeping ducks. Earlier studies have documented half-brain sleep in a wide range of birds. The brain hemispheres take turns sinking into the sleep stage characterized by slow brain waves. The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere"s eye stays open and alert. Birds also can sleep with both hemispheres resting at once. Decades of studies of bird groups led researchers to predict extra alertness in the end-of-the-row sleepers which tend to be attacked more easily. Sure enough, the end birds tended to watch carefully on the side away from their companions. Ducks in the inner spots showed no preference for gaze direction. Also, birds napping at the end of the line depend on single-hemisphere sleep, rather than total relaxation, more often than inner ducks did. Turning 16 birds through the positions in a four-duck row, the researchers found that compared with 12 percent for birds in internal spots, outer birds half-asleep during some 32 percent of napping time. "We believe this is the first evidence for an animal behaviorally controlling sleep and wakefulness at the same time in different regions of the brain," the researchers say. The results provide the best evidence for a long-standing assumption that single- hemisphere sleep evolved as creatures scanned for enemies. The preference for opening an eye on the lookout side could be widespread, he predicts. He"s seen it in a pair of birds napping side-by-side in the zoo and in a single pet bird sleeping by a mirror. The mirror -side eye closed as if the reflection were a companion and the other eye stayed open. Useful as half-sleeping might be, it"s only been found in birds and such water animals as dolphins, whales, and seals. Perhaps keeping one side of the brain awake allows a sleeping animal to surface occasionally to avoid drowning. Studies of birds may offer unique insights into sleep. Jerome M. Siegel of the UCLA says he wonders if birds" half-brain sleep "is just the tip of the iceberg." He supposes that more examples may turn up when we take a closer look at other species. | |||
| 1. According to the passage, birds often half sleep because _____. | |||
| [ ] | |||
| A. they have to watch out for possible attacks B. their brain hemispheres take turns to rest C. the two halves of their brain are differently structured D. they have to constantly keep an eye on their companions | |||
| 2. What is implied about the example of a bird"s sleeping in front of a mirror? | |||
| [ ] | |||
| A. An imagined companion gives the bird a sense of security. B. Birds prefer to sleep in pairs for the sake of their security. C. The phenomenon of birds napping in pairs is widespread. D. A single pet bird enjoys seeing its own reflection in the mirror. | |||
| 3. While sleeping, some water animals tend to keep half awake in order to _____. | |||
| [ ] | |||
| A. alert themselves to the approaching enemy B. emerge from water now and then to breathe C. be sensitive to the ever-changing environment D. avoid being swept away by rapid currents | |||
| 4. By saying "just the tip of the iceberg", Siegel suggests that _____. | |||
| [ ] | |||
| A. half-brain sleep has something to do with icy weather B. the mystery of half-brain sleep is close to being solved C. most birds living in cold regions tend to be half sleepers D. half-brain sleep may exist among other species |