Most scientists are now certain that global warming is taking place. Gases such as carbon dioxide are creating a warm blanket around the earth. This blanket is trapping heat in the atmosphere, and so raising the temperature of the earth.
In Europe, eight of the last ten years have seen record high temperatures. On the other hand, the countries around the Mediterranean Sea are receiving even less rain than before. In Sub- Saharan Africa the crops are drying out in the fields and people are dying of starvation. In 1999, the southern United States was struck by a serious of destructive(毁灭性的) hurricanes. Scientists expect such trends to continue, and to worsen, if global warming cannot be stopped.
In addition to worrying about rising global temperatures and extreme weather conditions, scientists are closely monitoring sea levels around the world. They are slowly rising, as the northern and southern polar ice caps start to melt. This will have serious consequences for low-lying countries near the sea. Already parts of these places are disappearing under the rising sea water.
According to a new research, one contradictory feature(特征) of global warming is that it will probably lead to a period of much colder weather. Scientists base their theory on what happened the last time the world warmed up, 8,300 years ago. They have discovered that when the ice melted from the northern polar ice cap it became trapped in a lake in northern Canada. As more ice melted, this lake suddenly burst open, pouring millions of tons of freezing fresh water into the North Atlantic. This flood of water prevented the normal flow of water in the Atlantic, which takes warm water from the tropics(热带地区) north to Europe. When this flow of warm water was cut off, temperatures in Europe dropped by between three and eight degrees over the next 200 years. ''That's the concern here,'' says Richard Alley, an American climate expert. ''The climate hasn't varied much in 8, 000 years. But big changes could come back!''
1.What is the overall effect of global warming on Europe?
A.A warmer climate. B.A decline in rainfall.
C.An increase of hurricanes. D.A decrease of crop production.
2.What is Paragraph 3 mainly about?
A.The rising sea level. B.The melting of icebergs.
C.The increase in disasters. D.The cause of global warming.
3.How does the author describe the climate change in Europe 8 ,300 years ago?
A.By offering statistics. B.By giving an example.
C.By making comparisons. D.By analyzing the process.
4.What can we infer from Richard Alley' s words?
A.Global climate change will bring more disasters.
B.Global warming will likely produce a colder climate.
C.Global warming will continue for the next two centuries.
D.Global climate will remain unchangeable in the next 8,000 years.
高一英语阅读选择困难题
Most scientists are now certain that global warming is taking place. Gases such as carbon dioxide are creating a warm blanket around the earth. This blanket is trapping heat in the atmosphere, and so raising the temperature of the earth.
In Europe, eight of the last ten years have seen record high temperatures. On the other hand, the countries around the Mediterranean Sea are receiving even less rain than before. In Sub- Saharan Africa the crops are drying out in the fields and people are dying of starvation. In 1999, the southern United States was struck by a serious of destructive(毁灭性的) hurricanes. Scientists expect such trends to continue, and to worsen, if global warming cannot be stopped.
In addition to worrying about rising global temperatures and extreme weather conditions, scientists are closely monitoring sea levels around the world. They are slowly rising, as the northern and southern polar ice caps start to melt. This will have serious consequences for low-lying countries near the sea. Already parts of these places are disappearing under the rising sea water.
According to a new research, one contradictory feature(特征) of global warming is that it will probably lead to a period of much colder weather. Scientists base their theory on what happened the last time the world warmed up, 8,300 years ago. They have discovered that when the ice melted from the northern polar ice cap it became trapped in a lake in northern Canada. As more ice melted, this lake suddenly burst open, pouring millions of tons of freezing fresh water into the North Atlantic. This flood of water prevented the normal flow of water in the Atlantic, which takes warm water from the tropics(热带地区) north to Europe. When this flow of warm water was cut off, temperatures in Europe dropped by between three and eight degrees over the next 200 years. ''That's the concern here,'' says Richard Alley, an American climate expert. ''The climate hasn't varied much in 8, 000 years. But big changes could come back!''
1.What is the overall effect of global warming on Europe?
A.A warmer climate. B.A decline in rainfall.
C.An increase of hurricanes. D.A decrease of crop production.
2.What is Paragraph 3 mainly about?
A.The rising sea level. B.The melting of icebergs.
C.The increase in disasters. D.The cause of global warming.
3.How does the author describe the climate change in Europe 8 ,300 years ago?
A.By offering statistics. B.By giving an example.
C.By making comparisons. D.By analyzing the process.
4.What can we infer from Richard Alley' s words?
A.Global climate change will bring more disasters.
B.Global warming will likely produce a colder climate.
C.Global warming will continue for the next two centuries.
D.Global climate will remain unchangeable in the next 8,000 years.
高一英语阅读选择困难题查看答案及解析
If you take a look around your kitchen or office right now, chances are that you’ll notice you’re surrounded by plastic—water bottles, to-go coffee cups, straws, plastic grocery bags, food wrappers, take-out containers, single-serve coffee pods and produce bags. 1.．
It’s certainly not realistic to remove all plastic from your life, but let’s examine some statistics that may encourage you to reduce your single-use plastic footprint by throwing away straws, switching to reusable water bottles, bringing cloth bags to the grocery store and more.
According to a study published in the journal Science Advances, the popularity of plastic, which began rising in the 1950s, is growing out of control. 2.．And there’s no sign of slowing down, considering scientists say that another 12 trillion kilograms will be produced worldwide by 2050.
“Every piece of plastic that has ever been created will remain in the environment in some form, but once we conveniently throw out our rubbish at home, wind and runoff carry our waste from landfills and streets to the ocean,” says Mystic Aquarium’s chief clinical veterinarian Jennifer Flower, DVM, MS. “Given that we are globally producing over 320 million tons of plastic annually, the marine environment is taking a big hit from our daily disposal of plastic.
3.. For example, newborn fish are mistaking tiny bits of plastic waste for food. If they die, there will be fewer big fish—and that could damage the food chain. Often our society is so focused on making our lives more convenient in the short term, but in the long run, our health and the health of marine life are at the expense of those everyday conveniences.”
4.．A recent report suggests that when heated, certain food additives (添加剂) can damage hormones, growth and development, as well as increase chances for children of being fat. 5.．It is found in plastic containers and metal cans. Parents are urged to avoid using microwaves to warm food and drinks or placing plastics in the dishwasher.
A.Using plastic containers in microwaves is also harmful to children’s health.
B.Our plastic consumption is directly affecting the life in the ocean.
C.8.2 trillion kilograms of plastic have been produced around the world.
D.People are concerned about the results of overusing plastic containers.
E.Let’s stop using plastic for the benefit of the environment and human beings.
F.The most concerning artificial additive BPA is a chemical used in the production of plastics.
G.These are all examples of single-use plastic products, which is a hot topic nowadays.
高一英语七选五中等难度题查看答案及解析
The earth is the only planet that scientists are certain has life .What does the earth have that the other planets don’t ? For one thing , the earth has just the right temperature . As the third planet from the sun , the earth seems to be just the right distance away . The planets that are closer to the sun are so hot that their surfaces bake in the sun . The farthest planets are cold balls .
When the earth developed— which scientists believe may have happened about billions of years ago , many gases covered the earth . The gases caused the earth to be hot . But something wonderful happened . The temperature was just right for thick clouds to form . It rained very hard for a very long time . This gave the earth its oceans . Water made it possible for plants to grow . The plants created oxygen in the atmosphere . Oxygen is the gas that humans and animals breathe .
Only one other planet in the solar system seems to be something like the earth . That planet is Mars . Mars is smaller than the earth , and it is quite a bit cooler . But it is not too cold for humans . On some days , the temperatures are as cold as a winter day in the northern United States . If you wore a special spacesuit , you could walk around on Mars . You would have to bring your own air to breathe , though . The air on Mars is too thin to breathe . Mars has the largest volcano in the solar system . It is sixteen miles high . The highest volcano on the earth is five miles high . The most unexpected sight on Mars is dried-up river beds . Scientists believe that Mars was once much wetter that it is now . Does this mean there could have been living things on Mars ? Scientists are not sure , but there has been no sign so far .
1.It is the ________ on the earth that makes life possible .
A．temperature B．water C．oxygen D．temperature , water and oxygen
2.The underlined phrase “ the third planet ” means ________ .
A．the sun B．the earth C．the moon D．Mars
3.Which planet in the solar system is most like the earth ?
A．Mars . B．Moon . C．Sun . D．Mars and Moon .
4.Which of the following is TRUE ?
A．The earth has a history of about 4 million years .
B．There is no air on Mars .
C．The largest volcano on Mars is over three times higher than the highest one on the earth
D．Scientists believe there are living things on Mars .
5.The best title for the passage should be ________ .
A．Living Things on Our Earth B．The Moon
C．Living Things on the Moon D．Mars Is Most Like the Earth
高一英语阅读理解中等难度题查看答案及解析
Most people agree that a pet adds joy to a person’s life. Scientists are now finding that having a pet may keep its owner . And good health may add years to a person’s life.
Scientists have been the tie between pets and health for years. In 1990, a study was done with people aged 65 and older. It that pet owners went to the doctor less than people __ pets. Do pets make people ? Are people able to handle their everyday lives better? Alan Beck, who is a researcher, says that the answer to the questions is yes, then having pets may be a good idea.
Can pets also help people live longer? Rebecca Johnson did a study to . Johnson teaches nurses how to care for people. Her study shows that having pets may cause people to more slowly.
The human body makes many chemicals. Some of the chemicals make people feel . Others make people feel bad. In Johnson’s , levels of the “good” chemicals when people were around pets while levels of the “bad” chemicals went down. The good seemed to slow the aging of cells. If this is , maybe people should spend more time with their . Then people might feel better and longer.
You might be allergic（过敏的） to pets. Or you may not want to a pet. Never fear. A robotic, or computer pet may be just the thing for you.
Scientists are testing computer pets, like the robotic dog AIBO. They want to see if pets can help people the way dogs do.
Will a robotic pet the real pet sitting with you on the sofa? Something tells us that it will probably become a reality.
1.A. healthy B. excited C. mad D. hurried
2.A. carrying out B. making up C. looking at D. breaking down
3.A. warned B. showed C. reminded D. advised
4.A. through B. beyond C. against D. without
5.A. busier B. funnier C. happier D. angrier
6.A. though B. until C. if D. unless
7.A. find out B. put out C. turn out D. set out
8.A. sick B. friendly C. old D. lovely
9.A. age B. move C. walk D. grow
10.A. bored B. surprised C. sleepy D. good
11.A. study B. work C. story D. case
12.A. changed B. varied C. fell D. rose
13.A. sides B. chemicals C. studies D. dogs
14.A. important B. unusual C. true D. impossible
15.A. children B. pets C. friends D. neighbors
16.A. live B. wander C. stay D. travel
17.A. head for B. search for C. cheer for D. care for
18.A. family B. computer C. baby D. toy
19.A. brave B. quiet C. faithful D. real
20.A. destroy B. replace C. improve D. accompany
高一英语完形填空困难题查看答案及解析
Most people agree that a pet adds joy to a person’s life. Scientists are now finding that having a pet may keep its owner_________ . And good health may add years to a person’s life.
Scientists have been ________the tie（关系） between pets and health for years. In 1990, a study was done with people aged 65 and older. It _________that pet owners went to the doctor less than people ________pets. Do pets make people _________? Are people able to handle their everyday lives better? Alan Beck, who is a researcher, says that _________the answer to the questions is yes, then having pets may be a good idea.
Can pets also help people live longer? Rebecca Johnson did a study to _________. Johnson teaches nurses how to care for ________people. Her study shows that having pets may cause people to _________more slowly.
The human body makes many chemicals. Some of the chemicals make people feel _________. Others make people feel bad. In Johnson’s _________, levels of the “good” chemicals ________when people were around pets while levels of the “bad” chemicals went down. The good ________seemed to slow the aging of cells. If this is ________, maybe people should spend more time with their ________. Then people might feel better and _________longer.
You might be allergic（过敏的） to pets. Or you may not want to ________a pet. Never fear. A robotic, or computer pet may be just the thing for you. Scientists are testing computer pets, like the robotic dog AIBO. They want to see if _______pets can help people the way _________dogs do.
Will a robotic pet ________the real pet sitting with you on the sofa? Something tells us that it will probably become a reality.
1.A. excited B. mad C. hurried D. healthy
2.A. carrying out B. making up C. looking at D. breaking down
3.A. showed B. warned C. reminded D. advised
4.A. through B. beyond C. against D. without
5.A. busier B. happier C. funnier D. angrier
6.A. though B. if C. until D. unless
7.A. find out B. put out C. look out D. set out
8.A. sick B. friendly C. lovely D. old
9.A. move B. grow C. age D. walk
10.A. bored B. good C. sleepy D. surprised
11.A. study B. work C. story D. case
12.A. changed B. varied C. fell D. rose
13.A. sides B. chemicals C. studies D. dogs
14.A. unusual B. important C. true D. impossible
15.A. neighbors B. friends C. pets D. children
16.A. live B. wander C. stay D. travel
17.A. head for B. search for C. cheer for D. care for
18.A. baby B. computer C. family D. toy
19.A. brave B. faithful C. real D. quiet
20.A. destroy B. accompany C. improve D. replace
高一英语七选五中等难度题查看答案及解析
Most people agree that a pet adds joy to a person’s life. Scientists are now finding that having a pet may keep its owner . And good health may add years to a person’s life.
Scientists have been the tie between pets and health for years. In 1990, a study was done with people aged 65 and older. It that pet owners went to the doctor less than people __ pets. Do pets make people ? Are people able to handle their everyday lives better? Alan Beck, who is a researcher, says that the answer to the questions is yes, then having pets may be a good idea.
Can pets also help people live longer? Rebecca Johnson did a study to . Johnson teaches nurses how to care for people. Her study shows that having pets may cause people to more slowly.
The human body makes many chemicals. Some of the chemicals make people feel . Others make people feel bad. In Johnson’s , levels of the “good” chemicals when people were around pets while levels of the “bad” chemicals went down. The good __ seemed to slow the aging of cells. If this is , maybe people should spend more time with their . Then people might feel better and longer.
You might be allergic（过敏的） to pets. Or you may not want to 57 a pet. Never fear. A robotic, or computer pet may be just the thing for you.
Scientists are testing computer pets, like the robotic dog AIBO. They want to see if __ pets can help people the way dogs do.
Will a robotic pet the real pet sitting with you on the sofa? Something tells us that it will probably become a reality.
1.A. healthy B. excited C. mad D. hurried
2.A. carrying out B. making up C. looking at D. breaking down
3.A. warned B. showed C. reminded D. advised
4.A. through B. beyond C. against D. without
5.A. busier B. funnier C. happier D. angrier
6.A. though B. until C. if D. unless
7.A. find out B. put out C. turn out D. set out
8.A. sick B. friendly C. old D. lovely
9.A. age B. move C. walk D. grow
10.A. bored B. surprised C. sleepy D. good
11.A. study B. work C. story D. case
12.A. changed B. varied C. fell D. rose
13.A. sides B. chemicals C. studies D. dogs
14.A. important B. unusual C. true D. impossible
15.A. children B. pets C. friends D. neighbors
16.A. live B. wander C. stay D. travel
17.A. head for B. search for C. cheer for D. care for
18.A. family B. computer C. baby D. toy
19.A. brave B. quiet C. faithful D. real
20.A. destroy B. replace C. improve D. accompany
高一英语完形填空中等难度题查看答案及解析
Fish species are expected to shrink in size by up to 24% because of global warming, say scientists.
The scientists argue that failure to control greenhouse gas emissions will have a greater effect on marine ecosystems than previously thought. Previous research has suggested that changing ocean temperatures would affect both the distribution and the reproductive abilities of many species of fish. This new work suggests that fish size would also be heavily affected.
The researchers built a model to see how fish would react to lower levels of oxygen in the water. As ocean temperatures increase, so do the body temperatures of fish. But, according to lead author, Dr William Cheung, from the University of British Columbia, the lower level of oxygen in the water is key. Warmer waters could decrease ocean oxygen levels and greatly reduce fish body weight. On the other hand, rising temperatures directly increase the metabolic rate of the fish's body function. This leads to an increase in oxygen demand for normal body activities. So the fish will run out of oxygen for growth at a smaller body size.
The research team also used its model to predict fish movements as a result of warming waters. The group believes that most fish populations will move towards the Earth's poles at a rate of up to 35km per decade. "So in, say, the North Sea," says Dr Cheung," one would expect to see more smaller-body fish from tropical waters in the future."
Taking these factors into consideration, the research team concludes that fish body size will shrink between 14% and 24%, with the largest decreases in the Indian and Atlantic oceans.
When compared with actual observations of fish sizes, the model seems to underestimate what's actually happening in the seas. The researchers looked at two case studies involving North Atlantic cod and haddock. They found that recorded data on these fish showed greater decreases in body size than the models had predicted.
Dr Alan Baudron, from the University of Aberdeen, UK, believes smaller-sized fish could seriously affect the ability of fish to reproduce. "Smaller fish produce fewer and smaller eggs which could affect the reproductive potential of fish stocks," he said.
1.What's the main idea of the passage?
A. Global warming makes fish smaller.
B. Global warming makes fish decrease in numbers.
C. Global warming affects the fish distribution.
D. Global warming affects the ability of fish to reproduce.
2.What is the key factor making the fish smaller now?
A. The rising body temperatures.
B. The lower level of oxygen in the water.
C. The increasing metabolic rate.
D. The normal body activities.
3.We can infer that as ocean temperatures increase .
A. more big fish will be born in the sea
B. fish tend to swim towards the shore
C. fish tend to move towards the warm areas
D. fish tend to move towards the colder areas
4.What does the underlined word "underestimate" mean?
A. make an exact prediction of B. make too low an estimate of
C. make too high an estimate of D. make a careful study of
高一英语阅读理解中等难度题查看答案及解析
An international team of scientists has discovered a stellar black hole in Earth’s “cosmic backyard” containing the mass of 70 suns.
It’s a black hole that forms after stars die, collapse, and explode. Researchers had long believed that the size limit was only 20 times the mass of our sun because as these stars die, they lose most of their mass through explosions that force matter and gas swept away by stellar winds.
This theory has now been toppled by LB-1, the newly discovered black hole. Located about 15,000 light years away, it has a mass 70 times greater than our sun, according to a press release from the Chinese Academy of Sciences.
“Black holes of such mass should not even exist in our galaxy (星系), according to most of the present models of stellar evolution,” said Liu Jifeng, head of the team that made the discovery.
“LB-1 is twice as massive as what we thought possible. Now theorists will have to take up the challenge of explaining its formation.”
Scientists are now scratching their heads at how LB-1 got so huge.
The team has proposed some theories. LB-1’s sheer size suggests that it “was not formed from the collapse of only one star,” the study said — instead, it could potentially be two smaller black holes orbiting each other.
Another possibility is that it formed from “fallback supernova (超行星).” This is when a supernova — the last stage of an exploding star — ejects (喷射) material during the explosion, which then falls back into the supernova, creating a black hole. This fallback formation is theoretically possible, but scientists have never been able to prove or observe it.
There are several types of black holes and stellar black holes like LB-1 are on the smaller side, according to NASA. Supermassive black holes are much bigger — they can be billions of times the mass of our sun.
Scientists believe supermassive black holes may have connection with the formation of galaxies, as they often exist at the center of the mass star stems but it is still not clear exactly how, or which form first.
1.According to scientists, what might account for the formation of LB-1?
A.The material ejected in the explosion of a supernova.
B.The smaller black holes moving around each other.
C.The evolution of the solar system.
D.The collapse of a certain star.
2.What does the word “toppled” in paragraph 3 probably mean?
A.Confirmed B.Strengthened. C.Overturned. D.Refused.
3.What is the purpose of writing this article?
A.To inform readers of the basic knowledge about black holes.
B.To share the recent development of the black hole discovery.
C.To show the importance of discovering black holes for science.
D.To report achievements scientists have made in black hole theory.
4.What might be the best title for the passage?
A.The Latest Discovery of Galaxies
B.Proposed Theories of Black Holes
C.The Possible Formation of the Black Holes
D.Biggest Stellar-mass Black Hole Discovered
高一英语阅读选择中等难度题查看答案及解析
By the end of the century, if not sooner, the world’s oceans will be bluer and greener thanks to a warming climate, according to a new study.
At the heart of the phenomenon lie tiny marine microorganisms (海洋微生物) called phytoplankton. Because of the way light reflects off the organisms, these phytoplankton create colourful patterns at the ocean surface. Ocean colour varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, leading to changes in the ocean’s appearance.
Phytoplankton live at the ocean surface, where they pull carbon dioxide (二氧化碳) into the ocean while giving off oxygen. When these organisms die, they bury carbon in the deep ocean, an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean’s warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth, since they need not only sunlight and carbon dioxide to grow, but also nutrients.
Stephanie Dutkiewicz, a scientist in MIT’s Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 39C, it found that multiple changes to the colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, such as those of the Arctic, a warming will make conditions riper for phytoplankton, and these areas will tum greener.” Not only are the quantities of phytoplankton in the ocean changing,” she said, “but the type of phytoplankton is changing.”
And why does that matter? Phytoplankton are the base of the food web. If certain kinds begin to disappear from the ocean, Dutkiewicz said, “it will change the type of fish that will be able to survive.” Those kinds of changes could affect the food chain.
Whatever colour changes the ocean experiences in the coming decades will probably be too gradual and unnoticeable, but they could mean significant changes. “It’ll be a while before we can statistically show that the changes are happening because of climate change,” Dutkiewicz said, “ but the change in the colour of the ocean will be one of the early warning signals that we really have changed our planet.”
1.What directly makes the change of the ocean’s appearance?
A.The increase of phytoplankton.
B.The way light reflects off the organisms.
C.The type and concentration of phytoplankton.
D.The decline of phytoplankton.
2.What does the underlined word “project” in Paragraph 4 probably mean?
A.Control. B.Use.
C.Predict. D.Discover.
3.What can we learn from the passage?
A.Phytoplankton are sensitive to the ocean’s warming trend.
B.Phytoplankton absorb carbon dioxide at the bottom of the ocean.
C.Oceans with more phytoplankton may appear bluer
D.Data have been found to show the change in the colour of the ocean
4.What is the main purpose of the passage?
A.To introduce a new method to study phytoplankton.
B.To explain the effect of climate change on oceans.
C.To analyze the consequences of ocean colour changes.
D.To analyze the composition of the ocean food chain.
高一英语阅读选择困难题查看答案及解析
Most people are certain that creativeness is something you are either born with or without. 1._____ There are ways available to raise your talent to a level you would like.
The first step to being more creative lies in believing you are actually creative. You cannot come out with good work until and unless you believe that you are good at what you are doing. 2._ ___All that has to be done is to develop this creative potential.
3._____Even if your new concepts seem to be way too unlikely, make sure that at least give them a try. Unique concepts may seem strange initially but can lead to major discoveries. All the creations in the history of humankind came out just because there were people who could think differently.
4._____ Many people have the habit of over-thinking and look for reasons not to do a particular thing. Learn how to take a chance. You really can’t develop your talents till and unless you are willing to take risks. Understand that you can’t have insurance for each and everything. Therefore if you’d like to do something, go on and do it.
Another vital thing to do to remain creative is to update your mind regularly. You need to provide more modern inspirations and thoughts to your consciousness to come up with new concepts. You should explore the world around yourself—visit museums, travel, read books, watch films and even try some new things that you have not done before.5.__ ___
A. Stop thinking too much.
B. However, that is not correct.
C. Do not ever be scared to think differently.
D. Such things help to encourage your creativity.
E. Just follow the tricks and you would be able to do your best.
F. All of us have some or the other level of creativity within us.
G. Let the windows of your mind open up to let in fresh creativity.
高一英语其他题中等难度题查看答案及解析