The scientists are now trying to discover tha...

The scientists are now trying to discover that use could be _________ such material.

高三英语单项填空简单题查看答案及解析

The fact that ants are fascinating insects has been known for some time. Now, scientists have discovered a large number of wood ants living in an abandoned underground storehouse in Templewo, Poland, despite having no obvious source of food.

Polish zoologist Wojciech Czechowski and his team began studying the underground colony in 2013. They found the ants built a 60-cm high nest in the soil directly over the storehouse vertical air pipe. As years passed, the metal covering on the pipe eroded, leaving behind a hole that thousands of worker ants accidentally slip into each day as they go about their daily chores. The scientists say that there are no sources of food in the storehouse. This means that the insects live in a state of near starvation.

In July 2015, the researchers disturbed part of the ant nest in search of larvae (幼虫), cocoons(茧), and queens. They found nothing, leading them to suspect that the lack of food and cold temperatures made reproduction impossible and that the group tending the nest is entirely made up of non-reproductive female workers. Their population is refilled every year, by a new rain of unfortunate ants that slide down the hole. The researchers say that when they returned in January 2016, the nest had been repaired. It appears that despite the terrible conditions, the worker ants do not stop constructing their nest.

Wood ants are known for their ability to adapt to bad living conditions. In this case, the millions of worker ants trapped in the storehouse have no choice. But instead of losing hope, they are making the best of the situation—a classic example of “when life gives you lesions make lemonade.”

1.How did the wood ants arrive in the storehouse?

A. They fell down there by accident.

B. The research team brought them there.

C. The storehouse builders left them there.

D. They were attracted by the environment.

2.What does the underlined word “eroded” in Paragraph 2 probably mean?

A. Expanded.　　 B. Rotted.　　 C. Exploded.　　 D. Melted.

3.What did the researchers find in the nest?

A. Larvae.　　 B. Cocoons.　　 C. A queen.　　 D. Worker ants.

4.Why did the population of wood ants remain steady?

A. They had enough food.

B. They were able to reproduce.

C. They adapted to the conditions.

D. They had new comers to join them.

高三英语阅读理解中等难度题查看答案及解析

Human cloning technology could be used to reserve heart attacks. Scientists believe that they may be able to treat heart attack by cloning their healthy heart cells and injecting them into the areas of the heart that have been damaged, and other problems may be solved if human cloning and its technology are not forbidden.

With cloning, infertile couples could have children. Current treatments for infertility, in terms of percentages, are not very successful. Couples go through physical and emotionally painful procedures for a small chance of having children. Many couples run out of time and money without successfully having children. Human cloning could make it possible for many more infertile couples to have children than ever before.

We should be able to clone the bone marrow（骨髓） for children and adults suffering from leukemia（白血病）. This is expected to be one of the first benefits to come from cloning technology. We may learn how to switch cells on and off through cloning and thus be able to cure cancer.

Cloning technology can be used to test for and perhaps cure gene-related diseases. The above is just a few examples of what human cloning technology can do for mankind. This new technology promises unprecedented （前所未有的）advancement in medicine if people will release their fears and let the benefit begin.

1.What does the underlined word “infertile” (paragraph 2) most probably mean?

A. with physical and emotional problems

B. short of time and money

C. unable to give birth to children

D. separated from each other for a long time

2.According to the text, one of the first expected benefits from cloning technology is in ______.

A. the treatment of mental diseases

B. the reserve of heart diseases

C. the cure of gene-related diseases

D. the bearing of babies

3.According to the writer, the main problem with the development of human cloning technology is that__________.

A. it has brought about benefits so far

B. it may be out of human control

C. people still know little about it

D. people are afraid of such technology

高三英语阅读理解中等难度题查看答案及解析

Scientists are trying to develop a special material, _______ they will make use of in space.

A. that             B.  what            C.  it           D. one

高三英语简单题查看答案及解析

Chinese scientists have found a new way to use cells found in human urine （尿液）that could aid in the treatment of a range of nerve disorders.That is a new technique for reprogramming cells in human urine into nerve progenitor cells  that can grow into multi-functional nerve and brain cells.

The technique is expected to be used in the study and treatment of nerve disorders such as Parkinson's disease, Alzheimer's disease and other nerve disorders.

Pei Duanqing, a professor at Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, said his research team has combined an episomal system to deliver reprogramming factors with a chemically defined culture medium to reprogram kidney epithelial(肾表皮) cells in urine into NPCs.

These NPCs, normally only found in the human brain, were later proven to be transgene-free and self-renewing, he said.

"These nerve and brain cells can survive for up to one month when transplanted into the brain of a newborn rat," said Pei. "My team is working hard to understand why our experimental condition allowed the urine cells to become NPCs, because we want to improve the technique and make it more efficient".

Scientists have long searched to treat and study neural disorders by obtaining and transplanting neural stem cells. However, the previous method of getting and using cells from either fetal (胎儿)or adult human tissue remains challenging due to ethical concerns and immune system rejections, he said.

Pei hopes the discovery will be used to generate NPCs from patients with nerve disorders such as Parkinson's disease. "These NPCs from patients may help us discover new drugs for these diseases."

"It is a remarkable advance in the stem cell field. The results and methods obtained from this study will be of great value and significance to the field, " said Fred Gage,a professor with the Salk Institute for Biological Studies.

1.What is the passage mainly about?

A. NPCs are beneficial in treating human diseases.

B. Chinese scientists succeeded in making NPCs from human urine.

C. Chinese scientists have found cures for all diseases.

D. A new technique was used to study the use of human urine

2.Pei and his tean try their best to work hard in order to________.

A. make more contributions to medical study

B. discover another new technique

C. make the technique more perfect

D. treat more patients suffering from bad diseases

3.What is the challenge of making NPCs in the previous method?

A. The ethical comcerns and immune system refusal

B. The difificulties in getting cells from human.

C. The under-developed techniques in medical science.

D. The lack of financial support from the government.

4.From the last paragraph we can infer________.

A. the new technique will be developed in science

B. the results and methods will be applied to treating cancers

C. the study will give a major push to the stem cell field

D. the mew technique will bring great profis

高三英语阅读理解中等难度题查看答案及解析

Scientists have discovered a special biological behavior in dolphins（海豚） that could lead to a treatment for late-onset diabetes（晚发的糖尿病） in humans. Studies on dolphins found that healthy dolphins switch into a diabetic-like state overnight when they are not feeding, but return to normal when they eat the following morning.

The extraordinary finding has led scientists to suggest that dolphins have “genetic switch” that allows them to imitate diabetes while they are not feeding for a night, without suffering any ill effect.

If researchers can identify a similar genetic pathway in human, they may be able to develop drugs to effectively switch off diabetes. Some 2.2 million people in Britain have type 2 (or late-onset) diabetes, a figure that is expected to reach 4 million by 2025 as a consequence of rising levels of obesity（肥胖）.

The tissues of people with type 2 diabetes have become resistant to insulin（胰岛素） so they lose the ability to control sugar levels in their blood. The condition can damage the heart, eyes, kidneys（肾脏） and nerves and contribute to 5% of all deaths, according to the World Healthy Organization.

Dolphins appear to imitate diabetes to keep high levels of blood sugar when food is rare. Like humans, dolphins need some sugar in their blood for their brains to function normally. Venn-Watson’s team analyzed 1,000 blood samples（样本） from 52 dolphins while they didn’t eat anything overnight and fed in the morning. At night time, the dolphins’ metabolism（新陈代谢）changed greatly and showed similar characteristics to that seen in people with type 2 diabetes.

“It is our hope that this discovery can lead to new ways to prevent, treat and maybe even cure diabetes in humans,” said Stephanie Venn-Watson, director of clinical research at the National Marine Foundation in San Diego.

1.What’s the main idea of the passage?

A. Humans get some idea of treating diabetes from dolphins.

B. Dolphins can switch into a diabetic-like state overnight.

C. Humans can suffer the same disease as dolphins.

D. Dolphins should be fed regularly to avoid diabetes.

2.The key to applying the finding to curing human diabetes lies in ____________.

A. producing insulin in a larger amount

B. developing drugs from healthy dolphins

C. identifying a similar genetic pathway in human

D. analyzing more blood samples from hungry dolphins

3. Which of the following statements is TRUE according to the passage?

A. Scientists have found a similar genetic switch in humans.

B. More British people will suffer type 2 diabetes due to obesity.

C. 2.2 million people with type 2 diabetes die in Britain every year.

D. Dolphins imitate diabetes to avoid a high blood sugar level.

4.What will happen to dolphins if not fed for a night according to Venn-Watson?

A. Their metabolism breaks down.

B. They become resistant to insulin.

C. Their heart and kidneys are damaged.

D. They keep high levels of blood sugar.

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

--- The news that the scientists in China are trying the ways to reduce the fog and haze was?　　　　　　 ---- Top notch! Never have I seen _____ before。

A. a better one 　　　　　 B. a worse one

C. the best one 　　　　　 D. the worst one

高三英语单项填空中等难度题查看答案及解析

The news that the scientists in China are trying the ways to reduce the fog and haze was ______ on the radio yesterday.

A. turned out　　　　　　 B. found out

C. given out　　　　　　 D. carried out

高三英语单项填空中等难度题查看答案及解析

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

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. Head researcher Hei Sook Sul said: "This protein could become an important target for research into the treatment and prevention of obesity and obesity - related diseases.” She added: "If you can somehow increase levels of this protein, you could__10.__(possible) lose more weight even if eating the same amount of food.”

高三英语语法填空中等难度题查看答案及解析