阅读理解。 Both warm-blooded and cold-blooded desert animals have ways to escape
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Both warm-blooded and cold-blooded desert animals have ways to escape the desert heat.
Warm- blooded desert animals, such as rats and mice, rest during the day, often staying in cool
underground burrows. At night they search for food. Animals that are out during the day, such as
cold-blooded lizards and snakes, are active only for short periods. As their body temperature rises,
these reptiles(爬行动物) move into the shade in order to cool down. In the early evening, when
the sun grows weaker, the reptiles become more active and begin their search for food again.
Getting enough water to survive is a major problem for all desert animals. Some desert animals,
like desert birds, manage to find water holes. Other desert animals, such as the kangaroo rat and the
related jerboa, get water only from the food that they eat. Because these animals eat mainly dry seeds,
they must survive on a tiny amount of water.
Most deserts have only a small number of frogs and toads because these animals must be near
water to survive. Yet even these creatures have adapted(适应) to desert conditions. When small
amounts of water collect in temporary streams, the desert-living frogs and toads become active.
After a rainfall, they lay their eggs. The eggs grow into tadpoles in a few days and into adults in just
four weeks. When the puddles(水坑) dry up, the adult frogs or toads dig into the ground. Their metabolism(新陈代谢) slows, and they stay beneath the ground until the next rain, which may be as good as
a year away. Until then, their bodily activities continue at a reduced rate.
The camel - often called the ship of the desert - is one of the most successful desert animals. Camels
can go for long periods without water, but eventually they must drink. When water becomes available
to them after a long drought, they may drink 95 liters of water or more. When water is not available,
what helps camels survive the desert heat is the fat stored in their humps(驼峰). A camel"s hump contains
about 12 kilograms of fat. Fat is rich in hydrogen. As the fat is digested, hydrogen from the fat combines
with oxygen in the air that the camel breathes. The result is H2O, or water. Each kilogram of fat that a
camel digests produces about a liter of water.
_____.B. it is easier to find water
C. they like the dark
D. they are less likely to be attacked at night
B. The kangaroo.
C. The frog.
D. The rat.
B. All the desert animals don"t rest during the day.
C. Cold-blooded desert animals are out most of the day.
D. None of the cold-blooded desert animals go out during the day.
B. Desert Animals
C. How Desert Animals Get Water
D. Ways To Escape the Desert Heat
B. caves
C. rooms
D. openings
答案
举一反三
Note that there is one word more than you need.
| A. ignored B. coincidentally C. immoral D. modest E. published F. instances G. instincts H. change I. simply J. announced |
| 阅读理解。 |
| Millions of years ago dinosaurs lived on the earth. In the days of dinosaurs, the whole earth was warm and wet. There were green forests and they could find enough to eat. Later, parts of the earth became cold and dry, and the forests there died. Then dinosaurs could not find enough to eat. This must be one reason why dinosaurs died out. We can guess another reason. New kinds of animals came on the earth. Some had big brains and strong. They could kill dinosaurs. There may be other reasons that we don"t know about yet. Scientists are are trying to make more discoveries about dinosaurs. Dinosaurs were of many sizes and shapes. Some were as small as chickens, while some were about 90 feet long. There were also terrible rights between dinosaurs. They night have happened more than 100 million years ago. Though there was no man to see any of the fights, we can be told by the animal"s footprints (足迹) that fights did take place. |
| 1. According to the passage, dinosaurs did exist only on the earth _____. |
| A. for millions of year B. millions of years ago C. more than 100 million years ago D. when it was warm and wet somewhere |
| 2. One reason why dinosaurs died out is that _____. |
| A. there were too many dinosaurs B. parts of the earth became cold and dry C. the dead forests there could not supply them with enough food D. they couldn’t find enough go eat |
| 3. One more reason why dinosaurs died out may be that _____. |
| A. new kinds of animals came on the earth B. some fast and strong animals with big brains could kill them C. some dinosaurs were as small as chickens D. some big dinosaurs died in the fights |
| 4. We can see from this passage _____. |
| A. scientists are trying to make some dinosaurs B. dinosaurs are dangerous enough C. dinosaurs are worth studying D. scientists know nothing about dinosaurs |
| 阅读理解。 |
| The blue tits (山雀) have been inspecting the nest-box again this year. The male is the house-hunter but the female will make the final choice. He lands at the hole and turns his head to expose his white cheeks as a signal to attract the female from where she has been feeding. Among many birds that nest in holes, the male has a light-coloured patch on its plumage (鸟羽) which acts as signal for drawing the female"s attention to a suitable nesting-place. Unlike the blue tit, the redstart (红尾鸲) may be only the male that strikingly coloured and the female is not beautiful. A few years ago I was lucky enough to spot a pair of redstarts in action in a Walsh wood. The male was leading an interested female to holes that he had previously (先前) checked out. He sat at the entrance of each hole and put his head on to show off his white forehead, or his head in to reveal (显露) his tail. If the female failed to react to his visual signals, the male sometimes sang for extra effect, while gliding towards her on spread wings and tail. Once the female accepts by following the male through the hole the displays stop, you must be at the right place at the right time to watch them. |
| 1. How do the blue tits choose their nest? |
| A. They choose their nest together. B. The male chooses their nest. C. The house-hunter chooses their nest. D. The female chooses their nest. |
| 2. The writer was lucky to see _____. |
| A. how the male made his tricks B. how an interested female played with the male happily C. what the male displayed and won the female D. that the male tried his best but failed to attract the female |
| 3. You can spot a pair of redstarts in a Walsh wood _____. |
| A. at any time B. regularly C. in April D. occasionally |
4. The writer is probably _____. |
| A. a bird expert B. a bird-hunter C. a bird raiser D. a scientist |
| 阅读理解。 |
| With only about 1, 000 pandas left in the world, China is desperately trying to clone (克隆) the animal and save the endangered species (物种). That"s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called "Noah"s Ark". Noah"s Ark is aimed at collecting eggs, embryos (胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M"s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future. It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years. This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal. The entire procedure could take from three to five years to complete. "The nuclear transfer (核子移植) of one species to another is not easy, and the lack of available (capable of being used) panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it"s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort," adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog. "They are trying to do something that"s never been done, and this is very similar to our work in Noah"s Ark. We"re both trying to save animals that face extinction. I certainly appreciate their effort and there"s a lot we can learn from what they are attempting to do. It"s a research that is very much needed." |
| 1. The aim of "Noah"s Ark" project is to _____. |
| A. make efforts to clone the endangered pandas B. save endangered animals from dying out C. collect DNA of endangered animals to study D. transfer the nuclear of one animal to another |
| 2. According to Professor Kraemer, the major problem in cloning pandas would be the lack of _____. |
| A. available panda eggs B. host animals C. qualified researchers D. enough money |
| 3. The best title for the passage may be _____. |
| A. China"s Success in Pandas Cloning B. The First Cloned Panda in the World C. Exploring the Possibility to Clone Pandas D. China -the Native Place of Pandas Forever |
| 4. From the passage we know that _____. |
| A. Kraemer and his team have succeeded in cloning a dog B. scientists try to implant a panda"s egg into a rabbit C. Kraemer will work with Chinese scientists in clone researches D. about two thousand of species will probably die out in a century |
| 阅读理解。 |
| Do you want to live another 100 years or more? Some exports say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span. "I think we are knowing at the door of immortality (永生)." said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075____________________________ and that"s a conservative estimate (保守估计的).” At the conference in San Francisco, Donald Louria, a professor and author at New Jersey Medical School in Newwark said advances in using genes as well as nanotechnology (纳米技术) make it likely that humans will live in the future beyond what has been possible in the past. "There is a great push so that people can live from 120 to 1  80 years." He said. "Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years." However, many scientists who specialize in aging are doubted about it and say the human body is just not designed to last past about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death. Scientists also differ on what kind of life the super aged might live. "It remains to be seen if you pass 120, you know; could you be healthy enough to have good quality of life?" said Leonard Poon, director of the University of George Gerontology Centre. "At present people who could get to that point are not in good health at all." |
| 1. What is the best title of the passage? (Please answer within 10 words) _______________________________________________________________________________ 2. Which sentence in the passage can be replaced by the following one? We have got some ideas about living longer. _______________________________________________________________________________ 3. Please fill in the blank in the second paragraph with proper words or phrases to complete the sentence. (Pease answer with 10 words) _______________________________________________________________________________ 4. Do you think it is possible for humans to live longer in the future? (Please answer within 30 words) _______________________________________________________________________________ 5. Translate the underlined sentence in the last paragraph into Chinese. _______________________________________________________________________________ |