Unlike modern animal scientists, dinosaur scientists cannot sit on a hillside and use telescopes to watch dinosaurs in order to know how they lived and whether they were good parents Instead, they have to search hard for information from dinosaurs’ fossils(恐龙化石) because dinosaurs died out millions of years ago.
It’s very difficult for the scientists to reach an agreement because different results can be got from the same fossils. Many fossils of the same kind of dinosaurs have been dug out from one place. They might have formed when an entire group of dinosaurs got stuck(陷入)all at once. Or they might have been the result of dinosaurs getting stuck one after another over a course of a few centuries. Thus we can say that dinosaurs might have in the first case lived in big groups and in the second lived alone.
Though there are two different results, dinosaur scientists now generally agree that at least some kinds of dinosaurs lived in big groups. “That’s pretty much settled at this point.” Says Paul Sereno, A kind of dinosaurs called Sauropods left behind tracks in the western United States that appear to run north and south, suggesting that they even moved long distances together.
As to whether dinosaurs cared for their young, dinosaur scientists have turned to the closest living relatives of dinosaurs ― birds and crocodiles ― for possible models. Birds give a lot of care to their young, while crocodiles just help their young to the water. The discovered fossils of dinosaurs sitting on their eggs and staying with their young suggest the parents were taking care of their babies, but we still cannot say that all dinosaurs did the same.
There is still a long way to go before the above questions could be answered. Dinosaur scientists will have to find more proof to reach an agreement.
1.Dinosaur scientists can get information directly by ________.
A. studying dinosaur fossils
B. examining modern animals
C. watching dinosaurs
D. using telescopes
2.What is pretty much settled according to Paul Sereno?
A. Half of the dinosaurs lived alone.
B. Most dinosaurs moved long distances.
C. Many dinosaurs settled in the north.
D. Some dinosaurs lived in big groups.
3.Dinosaur scientists can probably know whether dinosaurs were good parents by ________.
A. watching many kinds of animals
B. studying dinosaurs’ living relatives
C. following the tracks left behind
D. working on dug-out dinosaur eggs
4.Which of the following the according to the 4th paragraph?
A. Birds hardly ay attention to their young.
B. Baby crocodiles can look after themselves well.
C. Some dinosaurs took care of their young.
D. Birds and crocodiles take good care of their young.
高三英语阅读理解中等难度题
Unlike modern animal scientists, dinosaur scientists cannot sit on a hillside and use telescopes to watch dinosaurs in order to know how they lived and whether they were good parents Instead, they have to search hard for information from dinosaurs’ fossils(恐龙化石) because dinosaurs died out millions of years ago.
It’s very difficult for the scientists to reach an agreement because different results can be got from the same fossils. Many fossils of the same kind of dinosaurs have been dug out from one place. They might have formed when an entire group of dinosaurs got stuck(陷入)all at once. Or they might have been the result of dinosaurs getting stuck one after another over a course of a few centuries. Thus we can say that dinosaurs might have in the first case lived in big groups and in the second lived alone.
Though there are two different results, dinosaur scientists now generally agree that at least some kinds of dinosaurs lived in big groups. “That’s pretty much settled at this point.” Says Paul Sereno, A kind of dinosaurs called Sauropods left behind tracks in the western United States that appear to run north and south, suggesting that they even moved long distances together.
As to whether dinosaurs cared for their young, dinosaur scientists have turned to the closest living relatives of dinosaurs ― birds and crocodiles ― for possible models. Birds give a lot of care to their young, while crocodiles just help their young to the water. The discovered fossils of dinosaurs sitting on their eggs and staying with their young suggest the parents were taking care of their babies, but we still cannot say that all dinosaurs did the same.
There is still a long way to go before the above questions could be answered. Dinosaur scientists will have to find more proof to reach an agreement.
1.Dinosaur scientists can get information directly by ________.
A. studying dinosaur fossils
B. examining modern animals
C. watching dinosaurs
D. using telescopes
2.What is pretty much settled according to Paul Sereno?
A. Half of the dinosaurs lived alone.
B. Most dinosaurs moved long distances.
C. Many dinosaurs settled in the north.
D. Some dinosaurs lived in big groups.
3.Dinosaur scientists can probably know whether dinosaurs were good parents by ________.
A. watching many kinds of animals
B. studying dinosaurs’ living relatives
C. following the tracks left behind
D. working on dug-out dinosaur eggs
4.Which of the following the according to the 4th paragraph?
A. Birds hardly ay attention to their young.
B. Baby crocodiles can look after themselves well.
C. Some dinosaurs took care of their young.
D. Birds and crocodiles take good care of their young.
高三英语阅读理解中等难度题查看答案及解析
—What does this modern-day dinosaur look like?
—The tongue of this animal can be extended _____ of its body.
| A．more than twice the length | B．twice more than the length |
| C．more than the length twice | D．more twice than the length |
高三英语单项填空中等难度题查看答案及解析
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。
Scientists say crocodiles have outlived dinosaurs 1.some 65 million years. One reason why they are such good 2. (survive) is that they can go for a very long time without eating. And they are expert hunters,3.(use) their strong jaws to bite their prey(猎物) and then swallow it whole. When they lose a tooth they grow one right back. A crocodile can go through 8,000 4.(tooth) in one lifetime!
What does the expression “crocodile tears” mean? Simply put, “crocodile tears” are fake sadness. You pretend 5.(cry) and feel bad for something when in fact you could not care 6.(little). A great word to describe it is insincere. The phrase “crocodile tears” comes from an old myth that crocodiles would shed tears while eating their prey. A religious worker wrote that 7. a crocodile found a man by the water, it would kill him if it could. Then the crocodile would cry tears on the man, but then finally swallow 8.(he). Another myth suggests9.crocodile is very clever indeed. Crocodiles, the story goes, would cry tears as a false show of guilt or sadness to trick their prey. The prey would come closer and then become dinner.
Scientists explain that crocodiles DO create tears, but they do not cry. The tears help to clean their eyes. Crying is purely emotional and it 10. (reserve) for us humans.
高三英语语法填空中等难度题查看答案及解析
______the bones under the sand，the scientists concluded that they came from the dinosaurs about 65 million years ago．
A．Being inspected B．Inspected
C．Having inspected D．To inspect
高三英语单项填空中等难度题查看答案及解析
Modern society cannot well do without the contribution that women can make in the professions and other kinds of work. There is a serious shortage of nurses and teachers, to mention only two of the occupations followed by women. It is a waste to give years of training at public expense only to have the qualified teacher or nurse marry after a year or two and be lost forever to her profession. The training, it is true, will help her in her duties as a mother, but if she continued to work, her service would be more widely useful. Many factories and shops, too, are largely staffed by women, many of them married. While here the question of training is not so important, industry and trade would be seriously short of staff if married women did not work.
We can see then that there are good reasons for regarding it as desirable that married women should have some occupation outside the home. However, there are serious objections. Schools do not keep children occupied the whole day and school holidays are long. The mother’s working day will almost certainly end well after the school day and her holiday will not begin at the same time as her children’s. There will be therefore a period when children are not taken care of unless a substitute for the mother can be found, or unless it becomes more generally possible for women to work part-time. There seem to be some grounds for believing that there is more bad behavior among the children of working mothers than among those of mothers who stay at home, but more evidence is required before we can be certain of this. What we can be certain of, however, is that many more will continue to do so.
1.According to the writer, women nurses and teachers ought to carry on their occupation after marriage because______.
A. they are not allowed to give up their jobs
B. their training should not be wasted
C. they want to make a living by themselves
D. they must still improve themselves as mothers
2.According to the writer, one possible way for the children of working mothers to be attended to is that________.
A. schools keep children occupied the whole day
B. their mothers change their occupation
C. their mothers do not work full time
D. their mothers should stay at home
3.The clause “unless a substitute for the mother can be found” means_______.
A. if someone takes over the mother’s occupation
B. if no mother works all day
C. if no one takes care of the children for the mother
D. if someone takes care of the children for the mother
4.The writer believes that bad behavior among the children of mothers who do not work is _________ among the children of working mothers.
A. possibly less than B. about the same as
C. a little greater than D. certainly more than
高三英语阅读理解中等难度题查看答案及解析
So _____ that modern industry cannot develop without it.
| A．electricity is important | B．important is electricity |
| C．electricity important is | D．important electricity is |
高三英语单项填空简单题查看答案及解析
Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back.. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend themselves by using both physical and chemical means.
Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach..
Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.
Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with this kind of plant will teach an animal to stay away from it in the future.
1.The holly plant has more spines on the lower leaves because most animals________.
A. are not tall enough B. like the lower leaves only
C. are not clever enough D. can get the lower leaves easily
2.To defend themselves, oak trees use________.
A. chemical means B. physical means
C. bitter chemicals D. sandy materials
3.How does tobacco protect itself against an attack from a caterpillar?
A. Its leaves fight against the attack by physical means.
B. Its roots send a messenger to discourage the caterpillar.
C. Its roots increase the production of nicotine when it is attacked.
D. Its leaves produce poisonous sand to drive the caterpillar away.
4.What would be the best title for this passage?
A. Plants and Animals B. How Plants Defend Themselves
C. Attacks and Defenses D. How Animals Eat Plant Leaves
高三英语阅读理解中等难度题查看答案及解析
Animals can move from place to place, but plants cannot. When an animal is under attack, it can run away or fight back. Plants certainly cannot run away, and they lack teeth and claws. But plants can defend themselves by using both physical and chemical means.
Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach.
Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal's teeth.
Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液). A single experience with this kind of plant will teach an animal to stay away from it in the future.
1.The holly plant has more spines on the lower leaves because most animals________.
A．are not tall enough B．like the lower leaves only
C．are not clever enough D．can get the lower leaves easily
2.To defend themselves, oak trees use________.
A．chemical means B．physical means
C．bitter chemicals D．sandy materials
3.How does tobacco protect itself against an attack from a caterpillar?
A．Its leaves fight against the attack by physical means.
B．Its roots send a messenger to discourage the caterpillar.
C．Its roots increase the production of nicotine when it is attacked.
D．Its leaves produce poisonous sand to drive the caterpillar away.
4.What would be the best title for this passage?
A．Plants and Animals B．How Plants Defend Themselves
C．Attacks and Defenses D．How Animals Eat Plant Leaves
高三英语阅读理解中等难度题查看答案及解析
The human mind can many tasks that other animals cannot, like using language and judging what other people are thinking．
A． carry out B． take out C． put out D． bring out
高三英语单项填空中等难度题查看答案及解析
Scientists have discovered that rats have adapted to modern human life, even adapting their diets to the cities they live in.
The scientists claim that it could be possible that humans and rats have had similar changes in their genetic make-up, due to modern city life. The downside of the changes in the DNA is that they could make rats susceptible to the same health problems as humans, such as pollutants and sugary foods.
The study showed that rats’ diets have also adapted to their environment. In New York, you can see them eat bagels and beer; in Paris, they like croissants and butter. They adapt in amazing ways. The scientists also analyzed the genomes (基因组)of 29 New York rats and compared them with those of nine brown rats from Heilongjiang Province, north-east China. The finding showed that dozens of rat genes had been through major DNA changes over the centuries, as the rats spread from Asia to Europe and America, and from the countryside and into cities.
The changed genes were associated with diet, behavior, and movement, which added pressures and challenges for the rat to overcome. This could reflect the fact that urban rats have to move through highly artificial environments that are very different from natural habitats. So these gene changes might have evolved to help them move more easily through underground channels and pipes.
As the rats are closely associated with city-living humans, the scientists believe that it is possible that similar changes have happened in both species.
In October 2019, scientists used rats to successfully test an enzyme(酶) that could be used to help people quit smoking. Two groups of rats were trained to self-administer nicotine, and over two weeks their nicotine intakes increased, suggesting addiction. Then, one group of rats was given the enzyme, which led to a decreased nicotine intake. The scientists say that the enzyme could be developed for human use in the future.
1.Which of the following best explains the underlined phrase “susceptible to” in paragraph 2?
A.Not likely to be cured of. B.Being disease-resistant to.
C.Very likely to be affected by. D.Being thoroughly exposed to.
2.What does the author intend to show in the third paragraph?
A.Rats in the city are particular about their food.
B.Rats in different cities have different genetic make-up.
C.Rats are distributed in every continent of the earth.
D.Rats have been adjusting themselves to the environment.
3.What is the purpose of testing an enzyme on rats?
A.To explore rats’ survival ability. B.To help people stop smoking.
C.To learn more about city rats. D.To tell apart nicotine and enzyme.
4.What is the best title of this text?
A.Rats Have Adapted to Modern Human Life
B.Rats in the City Have Varieties of Diets
C.Rats Are More Adaptable than Humans
D.Rats Have the Same Genetic Make-up to Humans
高三英语阅读理解中等难度题查看答案及解析