Scientists have found it seems _______animals...

Scientists have found it seems _______animals and humans are much alike than we thought.

A．as though         B．even though       C．only if            D．even if

高三英语单项填空中等难度题查看答案及解析

Scientists have found that human eyes are more likely to be damaged by UV rays while skiing in the snow-covered areas than sitting on the beach, according to a report by the UK newspaper.

The researchers at Kanazawa Medical University, Japan and American company Johnson conducted the study together. They looked at the effects of light reflection on newly fallen snow on a ski trail in Ishikawa District, northern Japan. They compared the results with the levels of UV rays on a sand beach in southern Japan's Okinawa District.

They found that on the beach, eyes are exposed to a daily 260 kilojoules (千焦耳) of UV a square meter compared to 658 kilojoules　 in snow-covered areas.

The findings are supported by the Japan Meteorological (气象的) Agency. According to the agency, the reflection rate of UV light on beaches is often between 10 and 25 percent, compared to 80 percent in the new snow areas. The amount of light increased 4 percent with a 300-meter rise in height.

Most of us know that UV rays can harm the skin. That's why we wear sunscreen on our skin before we get out in the sun. But many of us may not realize that UV rays are also harmful to the eyes.

If your eyes are exposed to large amounts of UV radiation over a short period of time, you may experience a kind of sunburn of the eye, which is harmful. Your eyes will become red and feel a strange feeling. They may be sensitive to light. Fortunately, this is usually temporary and seldom causes permanent damage to the eyes.

Long-term exposure to UV radiation, however, can be more serious. Scientific studies and researches have shown that exposure to small amounts of UV radiation over a period of many years increases the chance of eye damage, which could lead to total blindness.

1.You would most likely find the article in ________.

A. a doctor’s diary　　 B. a travel journal

C. a medical magazine　　 D. a physics textbook

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

A. Too much eye exposure to UV rays may cause total blindness.

B. Short-time exposure of the eyes to UV rays doesn't harm them at all.

C. Most people know that UV rays harm the eyes as well as the skin.

D. The study was conducted by researchers from Japan, the USA and the UK.

3.Human eyes are more likely to be damaged by UV rays while skiing in the snow-covered areas than sitting on the beach because ________.

A. snow produces more UV light than water

B. people don’t wear sunscreen while skiing as they do while sitting on the beach

C. the reflection rate of UV light in snow-covered areas is much higher than that on the beach

D. human eyes are exposed longer to UV light in the snow- covered areas than on the beach

4.What will the passage most probably talk about next?

A. Never ski on newly fallen snow in Japan.

B. Go to hospital to have your eyes examined.

C. Wearing a hat can provide protection while skiing in new snow areas.

D. Take some measures to protect your eyes while skiing in new snow areas.

高三英语阅读理解困难题查看答案及解析

Global warming could make humans shorter. Scientists claim to have found evidence that it caused the world's first horses　 1.　　 （shrink） nearly 50 million years ago. In fact,a team from the universities of Florida and Nebreaks says　　 2.　　 has found a link between the Earth heating up and the size of mammals-homes，during the last time the world heated up. The scientists used fossils to follow the evolution of homes from their earliest 3.　　 （appear) 56 million years ago. As temperatures went up．their size went 4. . The scientists say that the current warming could have the same effect　 5.　 mammals and could even make humans 6.　 （small）．“Horses started out small，about the size of a small dog. What's 7.　 （surprise）is that after they first appeared，they then became even smaller and then dramatically increased in size, and that8.（exact）corresponds to the global warming event, followed by cooling.”"It had been known that mammals　 9. small during the last warm time， 10.　 we hadn't realized that temperature specifically was driving the evolution of body size”Dr. Bloch said in the "Science”journal.

高三英语语法填空简单题查看答案及解析

Scientists Diego Kersting and Cristina Linares have found that some coral species are able to recover from harmful warming events through a unique survival strategy (策略)—known as “rejuvenescence” (新生)—among corals in the Mediterranean Sea. The findings represent some rare good news for corals around the world, which are facing numerous severe threats—most notably, climate change.

“The main threats are climate change, overfishing, pollution and coastal urbanization,” Kersting said. “But currently, climate change is probably the one causing the most coral cover declines. Warming stresses corals up to a point that may cause death. Some corals bleach (白化) before dying. Other corals do not bleach but die directly.” He went on, “Our findings are significant because this survival strategy was only known from fossil corals that existed hundreds of millions of years ago. It is the first time that it has been found in a living coral. Thanks to our findings, we know now that some corals are able to recover, but unfortunately this is not enough in the current climate change context.”

For their research, Kersting and Linares monitored 243 colonies of the endangered reef-building coral Cladocoracaespitosa in Spain’s Columbretes Islands Marine Reserve over 16 years, starting in 2002. The monitoring revealed that Cladocoracaespitosa in the Mediterranean uses rejuvenescence to cope with warming events. This process involves the polyps — or the individual coral animals in a colony—shrinking inward and abandoning their skeletons (骨骼) during warm periods, before rejuvenating at a later point. “What happens is that some polyps in a coral colony—sometimes just one— reduces completely its dimensions and partially retreats from its skeleton,” Kersting said. “Once the stressful event is over, the shrunken or rejuvenated polyp recovers its size and builds up a new skeleton. Eventually, it begins to reproduce itself through budding and begins to cover the dead colony surfaces.”

He continued, “The results were very surprising because I started to observe colonies that were dead years ago, that were showing living parts many years after their death.”

1.What is the greatest threat to corals now?

A.Overfishing. B.Light pollution.

C.City growth. D.Climate change.

2.What can we learn about the survival strategy?

A.It is the cause of warming events.

B.It was found for the first time.

C.It will bring hope for the endangered corals.

D.It represents the evolution of the corals.

3.What does paragraph3 mainly talk about?

A.How the extreme corals forms.

B.How the polyps survive their competitors.

C.How the research was conducted.

D.How the coral species manages to recover and regrow.

4.What can best replace the underlined word “retreat” in paragraph3?

A.Withdraw. B.Unfold. C.Benefit. D.Steal.

高三英语阅读理解中等难度题查看答案及解析

It seems that we are one step closer to finding alien life and maybe a future home for humanity. Scientists from NASA (National Aeronautics and Space Administration) have found a new solar system filled with planets that look like Earth and could even support life.

The group of seven planets, which orbits a star called Trappist-1, is 40 light years away from Earth in the constellation of Aquarius(水瓶座). And three of them are in the so-called “habitable (宜居的)zone” ----the area around a star where liquid water is most likely to be found. This is important because water is a necessary ingredient for life.

All of the planets were found using a method called “transit photometry.” This works by watching out for when a planet passes in front of its host start. This blocks out a small amount of light, allowing us to see the planet and learn about its size.

“This is an amazing planetary system---not only because we have found so many planets, but because they are all surprisingly similar in size to the Earth,” astronomer Michael Gillon from the University of Liege in Belgium told The Independent.

Trappist-1 is a “dwarf star (矮星)” which is colder and shines dimmer than our sun. If a person were on one of the seven planets, everything would look a lot darker than usual. The amount of light heading toward our eyes would be about 200 times less than we get from the sun, according to The Independent.

Because of that, Trappist-1, together with many other dwarf stars, was never on the list of places where scientists look for alien life. but Michael Gillon, lead researcher behind the discovery, decided to give dwarf stars a chance. He built a telescope in Chile to observe 60 of the closest dwarf stars, and it turned out that Trappist-1 was worthy of the effort.

The researchers hope that they can spend more time watching the newly found planets to learn more about them. Even though more research is needed before determining whether these planets could really support life, the discovery is still encouraging. It shows just how many Earth-size planets could be out there.

“The discovery gives us a hint that finding a second Earth is not just a matter of if, but when,” NASA scientist Thomas Zurbuchen told the Telegraph.

1.Which of the following statements is TRUE about the newly found planets?

A. It will take human beings about 40 years to travel to them

B. Some of them might have the proper conditions to support life

C. They are spread out in the habitable zone around Trappist-1

D. Underground ice has been found in some them

2.“Transit photometry” is a special method mainly used to ________.

A. tell apart different stars

B. test the brightness of stars

C. search for and measure planets

D. work out the distance between stars

3.We can infer from the article that _______.

A. scientists will soon find an Earth-like planet that can support human life

B. researchers know a little about the environment on the newly found planets

C. dwarf stars have long been a popular choice in the hunt for Earth-like planets

D. the size of a planet is the top concern when scientists search for a “second Earth”

4.Which of the following can be the best title of the passage?

A. Life in space soon?

B. Any aliens in space?

C. Trappist-1, a dark dwarf star

D. New record, seven new solar systems

高三英语阅读理解中等难度题查看答案及解析

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

Animals seem to have the sense to eat when they are hungry and they do not eat more than their bodies need．It has been demonstrated（证明）that rats will, when given a choice over a period of time, prefer water with vitamins(维生素) to water without vitamins even though there is no difference in taste or smell between the two water bottles．When a fragrant（香的）flavor（作料）was added to the vitamin-enriched water, the rats did seem to prefer it and kept drinking it ,even after the vitamins were switched to the clear water．In time, however, they broke the habit and went back to where the necessary vitamins were．

In a classic experiment, babies of 6 to 12 months old were placed in a cafeteria（自助） feeding arrangement, with a wide selection of baby food before them．They were given whatever food they pointed to or appeared interested in．We are told that at first they showed some unusual eating patterns, but that over a period of time they managed to select well-balanced diet．

So, in choosing food, rats and babies do seem to know and act on what's best for them．Apparently, there is a kind of “body wisdom”, which humans soon lose．Most of us do not eat as wisely as we could．Many of our food preferences are culturally determined and influenced by long-formed habits．Some people eat fox, dog and blackbirds, while we eat cows and pigs．So what people eat and how much they eat seems to be greatly influenced by what is going on around them．

1.In the experiment on rats, a fragrant flavor was added to the rats’ drinking water to _____________ .

A．encourage rats to drink vitamins-enriched water

B．test whether rats know which drink is good for them

C．find out rats’ preference in flavor

D．demonstrate the vitamins are tasteless

2.According to the passage ,adults eating habits differ from those of babies because_________．

A．adults know better than babies what kind of food are good for their health

B．adults usually cannot resist the temptation of various delicious foods

C．adults have more choices of food than babies in eating patterns

D．adults' eating habits are closely related to the social and cultural customs

3.The author implied in the passage that most of us_________．

A．eat a balanced diet

B．choose the food that is of nutrition

C．have the habits influenced by the surroundings

D．like to eat the food with a fragrant flavor．

4.As far as their eating habits are concerned, babies and rats are similar in that_________．

A．both prefer flavored food and drink

B．both have the wisdom to choose a balanced diet

C．both have the same eating patterns

D．both develop a taste for the same kinds of flavors

高三英语阅读理解中等难度题查看答案及解析

Scientists are making new studies of color and its effects on our health. They have known for a long time that the color of a room or the color of the light in it can affect our feelings and emotions. Many prisons and hospitals have at least one room that is painted pink. Officials have found that light and color can produce physical changes in our bodies.

Professor Falfan worked with a group of 9 disabled children at school in Albert. Two of the children were blind. The other seven had normal sight. The scientists changed the color of the school room, and then looked for changes in blood pressure, heart beat and breathing rate. The effects of color changes were the same for the blind children as for those with normal sight. Their blood pressure dropped from about 120 to 100. Similar changes were reported in heart-beat and the breathing. The children were also calmer and less excited. Then the colors of the room were returned to orange and white. Blood pressure, heart-beat and breathing rate went up and the children became excited again.

Professor Falfan said different colors produce different levels of light energy. He said the differences seem to affect chemicals in the brain that carry messages from nerve to nerve and from nerve to muscle.

1. Light and color can affect　　.

A. only one’s feelings and emotions

B. one’s energy

C. one’s mental changes

D. one’s heart-beat, brain activities, blood pressure, feelings and emotions

2. The color of pink had a calming effect, that is to say, the color affects　　.

A. the chemicals in the brain

B. the eyes

C. the skin

D. the muscle

3.According to the text, orange and white are colors which can make people　　.

A. calm　　B. active　　C. sick　　D. blind

13. The colors in the school room mentioned in the passage were changed from　　.

A. orange to white

B. orange to dark blue

C. orange and white to pink or some other colors

D. gray to more colors

4. After reading the passage we can conclude that　　.

A. blind people can be affected by colors, too

B. one’s heart will beat faster in a colorful room than in a white room

C. the chemicals in the brain change with feelings and emotions

D. if one’s blood pressure drops, his breathing will get slower and slower

高三英语阅读理解中等难度题查看答案及解析

Humans and dogs have been working together for thousands of years, and some scientists even believe the two species have been living with one another for thousands of years． While having a dog will not improve your health if you never wanted a dog in the first place, dog lovers can benefit from living with them．

1.　　 Most of us know the benefits of exercise, but it can be a struggle to find the motivation to get up and get moving everyday． A dog provides strong motivations, and can make your daily walk or run less lonely and more fun．Moreover, you'll bum extra calories when helping your dog walk and doing brief training exercises with your dog． For some people, going for walks alone is scary, but a dog can make runs and walks feel more secure．l know that with Ranger．I have to walk him every day, and he's always ready each morning．Sometimes we even have an afternoon or early evening walk, which is better for my health．

2.　　 There's no doubt that dog ownership does come with some stresses, from making sure you've applied their weekly bath to worrying if your dog will get along with the other dogs at the dog park． But the benefits of pet ownership more than outweigh these small stresses． Research shows that a few minutes spent petting an animal． lowers blood levels of the stress hormone, which contributes to tiredness, weight gain and aging, and your pet can help kill its negative effects． A few minutes playing with your dog every day also releases powerful ¨feel-good" hormones that continue to function in the bloodstream．

3.　　 Many people living alone worry about thieves, and a dog can help give owners a sense of security． Thieves are less likely to break into a house with a barking dog, and your dog can help you feel less lonely whether you're just spending the night by yourself or living alone long-term．If your dog is older and struggles to move around, you can still rest easy knowing that your dog will get to a robber before you do．

4.　　 People who have regular positive interactions with others tend to live longer and be happier, and pets provide you with a valuable opportunity to meet and interact with other people． Even if you're shy, it's easy to strike up a conversation with another person if you're both talking about your animals． Visits to the dog park and meet--ups with other pet owners also provide pet owners with opportunities for interactions．If you're still anxious about meeting new people, consider joining a message board or online group for people with similar pets to yours． You'll quickly find yourself making new friends in addition to learning a lot about your best friend - your pet!

5.　　 In a fast-paced, high-stress world, depression and anxiety are at an all-time high． But pet owners have fewer mental illnesses, and animals are even used as treatment for people suffering from mental illness． If you struggle with depression, an animal can help you avoid such problems． The exercise and stress release you get from spending time with your pet may even reduce the effects of depression． Dog owners are also less stressed than people who don't own dogs, and reduced stress is strongly related with lower blood pressure, a longer life span, greater happiness and improved health．

高三英语其他题中等难度题查看答案及解析

Funny animals is a term used in comics and animated cartoons __________ the animals are given human characteristics.

A．where            B．that              C．why              D．as

高三英语单项填空简单题查看答案及解析