The researchers have discovered __________the...

The researchers have discovered __________they believe to be a new species.

A. which　　 B. who　　 C. where　　　　 D. what

高三英语单项填空中等难度题查看答案及解析

Researchers in the US say they might have discovered how to fight against and even reverse some processes of ageing, at least in mice. Injecting the blood of young mice into the older ones improved their brainpower, a study found. Scientists at Stanford University plan to carry out trials in people in the hope that new treatments for dementia(痴呆症) can be developed.

“There are factors present in blood from young mice that can recharge an old mouse’s brain so that it functions more like a younger one,”says Dr. Tony from Stanford University School of medicine. In the study published in Nature Medicine, mice aged 18 months were given injections of the blood taken from mice aged 3 months. The injected mice performed better on memory tests than mice of the same age that had not been given the blood. Dr. Tony said it was not known whether the same was true of humans, but a trial was planned.

A research center in UK said the treatment restored certain aspects of learning and memory in mice, but was of unknown importance to humans. The research, while very interesting, did not test the type of brain damage that was seen in dementia, which is not a necessary consequence of ageing.

Meanwhile, two similar studies by a separate team have thrown more light on how young blood may benefit the old, in mice at least. A substance in the blood of mice previously shown to have an anti-ageing effect on heart muscle also improved brain cells, according to a Harvard team. The research, published in Science, found the blood factors encouraged the growth of brain cells in old mice, and restored their sense of smell. The same chemical also improved muscle power of aged mice, the researchers found.

1. The underlined word in paragraph 1 probably means _________.

A. change　　　 B. destroy

C. speed　　　　 D. increase

2. Scientists in the US will test the discovery in humans with the aim of __________.

A. proving the possibility to live longer.

B. showing the importance of scientific research.

C. publishing the study in Nature Medicine.

D. treating an age-related disease successfully.

3.According to the studies, the blood from young mice benefits the old in certain ways except in_________.

A. memory　　 　 B. muscle power

C. fur color　　 D. brain cells

4.What’s the author’s attitude to the anti-ageing studies?

A. supportive　　 B. objective

C. negative　　 　 D. doubtful

高三英语阅读理解中等难度题查看答案及解析

Researchers in Australia have discovered an effective new method to capture the atmospheric carbon dioxide that is damaging our planet and transform it into something solid, making it much easier to store.

Carbon capture isn’t new, but previous methods call for the gas to be compressed into liquid and then injected underground. Widespread usage of that technology has been locked by economic and environmental concerns due to possible leaks. Instead, in a study published in Nature Communications, the group details their sustainable and cost-effective plan for transforming CO2 into coal.

This new process involves a liquid metal catalyst( 催化剂 )that is efficient in conducting electricity. CO2 gas is dissolved in a container with some liquid. Once electricity charge is introduced, the CO2 begins to turn into solid pieces of carbon, which can be collected and stored.

What makes this particularly unique is that the entire process can occur at room temperature. Previous experiments have only shown a gas to solid conversion at extremely high temperature, which made it impossible on a large scale. Now, the researchers are hoping that their work will be used to create even further when it comes to carbon storage.

In an interesting side benefit, the solid carbon also works as an electrode( 焊 条 ), which opens up a world of possibilities. “A side benefit of the process is that the carbon can hold electrical charge, becoming a super battery, so it could potentially be used as a part in future vehicles,” explains Dr. Dorna Estrafilzadeh, a researcher. “The process also produces fuel as a by-product, which could also have industrial applications.”

1.What can we know about the previous carbon capture methods?

A.People have to inject liquid to the gas.

B.The previous methods can be done easily.

C.The previous methods are not very popular.

D.People have widely accepted previous methods.

2.What is the special part of the new method?

A.It needs electricity to make the process efficient.

B.It can be done in any kind of container.

C.It doesn’t need extreme temperature.

D.It can produce much solid carbon.

3.What can we infer from the last paragraph?

A.The method will make fossil oil disappear.

B.The method will influence the future industry.

C.The method will make developed countries more powerful.

D.The method will be used to make new vehicles.

4.What is the best title for the passage?

A.How to change carbon into CO2.

B.A new carbon capture technology.

C.A new technology to get useful carbon.

D.Australia makes the world cleaner than before.

高三英语阅读理解中等难度题查看答案及解析

For the first time, researchers have discovered that some plants can kill insects in order to get additional nutrients. New research shows that they catch and kill small insects with their own sticky hairs near the roots and then absorb nutrients through their roots when the insects are killed and fall to the ground.

Professor Mark Chase, of Kew and Queen Mary, University of London, said: “The cultivated (改良的) tomatoes and potatoes still have the hairs. Tomatoes in particular are covered with these sticky hairs. They do trap small insects on a regular basis. They do kill insects.”

The number of these carnivorous plants is thought to have came up to 50 percent and many of them have until now been wrongly regarded as among the most harmless plants. Among them are species of petunia（矮牵牛）, some special tobacco plants and cabbages, some varieties of potatoes and tomatoes, etc. Researchers at Royal Botanical Gardens Kew, which carried out the study, now believe there are hundreds more killer plants than previously realized.

It is thought that the technique was developed in the wild to get necessary nutrients in poor quality soil – and even various plants grown in your vegetable garden still have the ability.

The researchers, publishing their finding in the Botanical Journal of the Linnean Society, said: “We may be surrounded by many more murderous plants than we think.” “We are accustomed to thinking of plants as being immobile and harmless, and there is something deeply frightening about the thought of meat-eating plants," they added.

1.Tomatoes and potatoes kill insects to _____.

A. get more sticky hairs

B. make themselves grow better

C. make their roots stronger

D. avoid falling down to the ground

2.The word “carnivorous” in Paragraph 3 most probably means _____.

A. fast-growing

B. harmless

C. insect-killing

D. nutritious

3.The insect-killing technique of vegetables is developed most probably through _____.

A. evolution of species

B. helps from other garden plants

C. artificial cultivation

D. nutrients preserved in rich soil

4.The text is probably taken from _____.

A. a student book

B. a science fiction

C. a scientific repot

D. a bulletin board

高三英语阅读理解中等难度题查看答案及解析

For the first time, researchers have discovered that some plants can kill insects in order to get additional nutrients. New research shows that they catch and kill small insects with their own sticky hairs near the roots and then absorb nutrients through their roots when the insects are killed and fall to the ground.

Professor Mark Chase, of Kew and Queen Mary, University of London, said: “The cultivated (改良的) tomatoes and potatoes still have the hairs. Tomatoes in particular are covered with these sticky hairs. They do trap small insects on a regular basis. They do kill insects.”

The number of these carnivorous plants is thought to have came up to 50 percent and many of them have until now been wrongly regarded as among the most harmless plants. Among them are species of petunia(矮牵牛), some special tobacco plants and cabbages, some varieties of potatoes and tomatoes, etc. Researchers at Royal Botanical Gardens Kew, which carried out the study, now believe there are hundreds more killer plants than previously realized.

It is thought that the technique was developed in the wild to get necessary nutrients in poor quality soil ­ and even various plants grown in your vegetable garden still have the ability.

The researchers, publishing their finding in the Botanical Journal of the Linnean Society, said: “We may be surrounded by many more murderous plants than we think.” “We are accustomed to thinking of plants as being immobile and harmless, and there is something deeply frightening about the thought of meat­eating plants，” they added.

1.Tomatoes and potatoes kill insects to ________.

A．get more sticky hairs

B．make themselves grow better

C．make their roots stronger

D．avoid falling down to the ground

2.The word “carnivorous” in Paragraph 3 most probably means ________.

A．fast­growing　 B．harmless

C．insect­killing　 D．nutritious

3.The insect­killing technique of vegetables is　 developed most probably through ________.

A．evolution of species

B．helps from other garden plants

C．artificial cultivation

D．nutrients preserved in rich soil

4.The text is probably taken from ________.

A．a student book　     B．a science fiction

C．a scientific repot　     D．a bulletin board

高三英语阅读理解中等难度题查看答案及解析

The monument was built in honor of the explorer who was believed _____ the river.

高三英语单项填空简单题查看答案及解析

The traditional goal of science is to discover how things are, not how they ought _____.

A. to be　　　　　　　　　 B. be　　　　　　　　　　 C. have been　　　　 D. To

高三英语单项填空中等难度题查看答案及解析

So far no one has claimed the money ______ in the library.

A. to be discovered B. having discovered C. discovered D. discovering

高三英语单项填空中等难度题查看答案及解析

Ants know when an earthquake is about to strike, researchers have discovered. Their behavior changes significantly prior to the quake and they resume normal functioning only a day after it. Gabriele Berberich of the University Duisburg-Essen in Germany presented these findings on Thursday at the European Geosciences Union annual meeting in Vienna according to LiveScience.

Berberich and her colleagues discovered that red wood ants preferred to build their colonies right along active faults in Germany. They counted 15,000 mounds （土堆)）lining the faults. These faults are the places where the earth violently bursts in earthquakes.

Using a special camera that tracked changes in activity. Berberich and her colleagues tracked the ants round the clock for three years, 2016 to 2019. They found that the ants' behavior changed only when the quake was over magnitude （级数）2. There were 10 earthquakes between magnitude 2.0 and 3.2 during this period, and many smaller ones. Humans can also sense quakes of over magnitude 2 only.

According to Berberich, normal ant activity consists of going about collecting food etc,during the day and resting in the night But before an earthquake, the ants didn't go back to their mound in the night and moved around outside it. This strange and abnormal behavior continued till a day after the earthquake, Berberich told a news conference, according to Livescience.

How do ants know an earthquake is coming? Berberich suggested that they could either be picking up changing gas emissions or noting tiny changes in the Earth's magnetic fields （磁场）. "Red wood ants have special cells which can detect changes in carbon dioxide levels. They also have special cells for detecting electromagnetic fields." she said. Berberich and her colleagues are planning to continue the research in areas where there are more and bigger earthquakes

1.What's the meaning of the underlined word "resume" in Paragraph 1?

A.Form. B.Avoid.

C.Recover. D.Improve.

2.What's the function of the first paragraph?

A.To lead to the main topic. B.To describe a new species of ant,

C.To introduce a famous researcher D.To tell how to predict an earthquake.

3.What happens to the ants before an earthquake?

A.They have no appetite. B.They are too excited to rest.

C.They get lost on their way home. D.They refuse to go inside their nests.

4.What can we conclude from the last paragraph?

A.Ants can only detect smaller earthquakes.

B.The result of the research is completely reliable.

C.Ants may have two ways to predict earthquakes.

D.Researchers don't know how ants predict earthquakes.

高三英语阅读理解中等难度题查看答案及解析

Scientists have discovered that 　 1.　 (stay) in the cold could help us lose weight. Researchers at the University of California found that exposure to the cold increases levels of a protein that helps form brown fat -- the type of fat that produces heat and keeps us warm. Brown fat burns energy, 　 2.　 helps us lose weight. White fat stores extra energy, which results 　 3.　 weight gain. The researchers said that because air conditioning and heating give us constant, 4.　 (comfort) temperatures, our body’s need for brown fat has decreased. They found that outdoor workers in northern Finland who 　 5.　 (expose) to cold temperature have 6. significant amount of brown fat when 7.　 (compare) to same-aged indoor workers.

The research was conducted on two different control groups of mice. 　 8. group was injected with the protein that helps create brown fat. This group later gained 30% less weight after both groups were fed high-fat diets. The researchers say this could be good news in the fight against obesity. People who are obese have 　 9. （low) levels of brown fat than thinner people. If you can somehow increase levels of this protein, you could　　 10.　 (possible) lose more weight even if eating the same amount of food.

高三英语信息匹配中等难度题查看答案及解析