Sometimes we may find that every week there a...

Sometimes we may find that every week there are a lot of new stories about how climate change is affecting the planet, or new plans to battle its effects like the one announced by President Barack Obama the other day. But the concept itself isn't new at all --- in fact, scientists have been exploring questions about climate change for almost 200 year.

The idea of “greenhouse gases” goes back to 1824, when Joseph Fourier wondered what was regulating the earth's temperature. Fourier concluded that the atmosphere must be responsible for containing the heat absorbed from the sun and described it as a box with a glass lid: As light shines through the glass, the inside gets warmer as the lid traps the heat. As Fourier's ideas spread, it came to be called “the greenhouse effect”.

Scientists continued to study the greenhouse effect. Until a Swedish chemist named Svante Arrhenius came along, scientists understood how global warming actually works. After years of work, Arrhenius determined that the level of carbon dioxide in the atmosphere did in fact have a direct effect on global temperatures.

Arrhenius found that CO2, and other gases trap radiation, which warms the atmosphere. Arrhenius was the first to suspect that burning coal could contribute to the greenhouse effect. But Arrhenius welcomed the warming effect on the planet. At a lecture later that year, Arrhenius noted that creatures of a warmer earth “might live under a milder sky and in less barren surroundings”.

While Arrhenius' findings won him the 1903 Nobel Prize in chemistry, scientists kept debating whether the greenhouse effect was increasing until 1950, when researchers finally began to find strong data supporting it. By the end of the 1950s, American scientists had been sounding the alarm on the long-term consequences of climate change. Climate change research has come a long way since Fourier first described the greenhouse effect – still, maybe Arrhenius should have been more careful of what he wished for.

1.What can we know from Paragraph 1?

A. Climate change has caused terrible disasters.

B. The topic of climate change has been talked a lot.

C. Scientists should work harder to research climate change.

D. The whole world should cooperate to protect the environment.

2.What does the underlined word “it” in Paragraph 2 refer to?

A. The atmosphere.

B. The idea.

C. The earth.

D. The earth's temperature.

3.What's the main idea of Paragraph 3?

A. Serious consequences of climate change.

B. The history of studying the greenhouse effect.

C. Significant research findings about climate change.

D. Scientists' doubts about the cause of global warming.

4.What did Arr henius think of the greenhouse effect?

A. It was beneficial for creatures on the earth.

B. It was totally responsible for climate change

C. It brought more troubles than benefits to human beings.

D. It worked as a punishment for human harmful activities.

5.What's the author's attitude towards Arr henius' expectation?

A. Cautious.　　 B. Defensive.　　 C. Positive.　　 D. Negative.

高三英语阅读理解中等难度题查看答案及解析

Sometimes we may find that every week there are a lot of new stories about how climate change is affecting the planet, or new plans to battle its effects. But the concept itself isn’t new at all — in fact, scientists have been exploring questions about climate change for almost 200 years.

The idea of ''greenhouse gases'' goes back to 1824, when Joseph Fourier wondered what was regulating the earth's temperature. Fourier concluded that the atmosphere must be responsible for containing the heat absorbed from the sun and described it as a box with a glass lid: As light shines through the glass, the inside gets warmer as the lid traps the heat. As Fourier's ideas spread, it came to be called ''the greenhouse effect''.

Scientists continued to study the greenhouse effect. Not until a Swedish chemist named Svante Arrhenius came along, did scientists understand how global warming actually works. After years of work, Arrhenius determined that the level of carbon dioxide in the atmosphere did in fact have a direct effect on global temperatures.

Arrhenius found that CO2, and other gases trap radiation, which warms the atmosphere. Arrhenius was the first to suspect that burning coal could contribute to the greenhouse effect. But Arrhenius welcomed the warming effect on the planet. At a lecture later that year, Arrhenius noted that creatures of a warmer earth ''might live under a milder sky and in less barren surroundings''.

While Arrhenius' findings won him the 1903 Nobel Prize in chemistry, scientists kept debating whether the greenhouse effect was increasing until 1950, when researchers finally began to find strong data supporting it. By the end of the 1950s, American scientists had been sounding the alarm on the long-term consequences of climate change. Climate change research has come a long way since Fourier first described the greenhouse effect — still, maybe Arrhenius should have been more careful of what he wished for.

1.What does the underlined word ''it'' in Paragraph 2 refer to?

A.The climate change. B.The greenhouse effect.

C.The atmosphere. D.The heat from the sun.

2.When did the scientists first find evidence for the bad effect of global warming?

A.In 1824. B.In 1903.

C.In 1950. D.200 years ago.

3.What's the author's attitude towards Arrhenius' wish?

A.Optimistic. B.Negative.

C.Neutral. D.Ambiguous.

4.What's the main idea of the text?

A.Causes of climate change. B.Effects of greenhouse gases.

C.Findings about global warming. D.Explorations on climate change.

高三英语阅读理解中等难度题查看答案及解析

There are new findings that not enough sleep may cause people to gain weight. Researchers say a lack of sleep can produce hormonal(激素的) changes that increase feelings of hunger.

In one study, researchers in the United States examined information on more than 1000 people. The people had taken part in a long-term study of sleep disorders.

Some people slept less than five hours a night. They had 15 percent higher blood levels of a hormone called ghrelin than people who slept eight hours. And they had 15 percent less of the hormone leptin. Experts say ghrelin helps make people feel hungry; leptin makes you feel full.

The scientists say these hormonal changes may be a cause of obesity in Western societies. They note the combination that sleep limitation is common and food is widely available.

The results were not affected by how much people exercised. People who are awake longer have more time to burn energy. But the researchers say loss of sleep may increase hunger especially for high-calorie foods, so people gain weight. It seems that, for survival, the body may be designed to store more fat during times with less sleep.

Researchers from Stanford University in California and the University of Wisconsin did the study. They found that the best amount of sleep for weight control is 7.7 hours a night.The Public Library of Science published the findings in its journal Medicine . Internet users can read the full study, free of charge, at plos. org.

1.Not enough sleep can cause obesity by ______.

A. burning more of your energy

B. making you want to eat more food

C. keeping you from doing exercise

D. helping you feel great without food

2.When you sleep 7.7 hours a night, you will ______ .

A. have your ghrelin level rise and leptin level drop

B.have your leptin level rise and ghrelin level drop

C.have your ghretin and leptin levels properly balanced

D.have your hunger increase and your weight decrease

3.You can read the findings________

A. Only on the Internet

B. only in Medicine

C. Both on the Internet and in Medicine

D. Neither on the Internet nor in Medicine

高三英语阅读理解中等难度题查看答案及解析

You may use banknotes every day. But did you know that there is a lot of science behind the money? 1.

Australia was the first country to use polymer(聚合物）banknotes in 1988. 2.

They can stop water from making them wet. They are also cleaner because bacteria don’t grow easily on them.

Now, the Australians have improved their banknotes again by creating a new 5-dollar note. The new one has a clear window in the middle in which there are pictures of an Australian bird and a building. 3.

Tilt (倾斜）the note a little and you will see the bird flapping its wings as if trying to fly away. Turn the note from side to side and you will notice the building come to life and spin. While these features are impressive and entertaining, that was not the reason why the Australian Government spent ten years perfecting them. Their primary purpose was to make it impossible to fake a banknote.

4. The new $ 5 bill now has a raised bump alongside the two long edges, enabling the blind or those with limited vision, to quickly determine its value.

The Australian government will give the new 10-dollar note the same features in a year’s time. 5.

A. Note makers still have a long way to go.

B. Other notes will have them in the future.

C. The magic of the new features lies in them.

D. They have many advantages over paper notes.

E. The new Australian 5-dollar note is a good example.

F. The new note is also the first touchable Australian banknote.

G. Their material and pattern set them apart from ordinary banknotes.

高三英语七选五中等难度题查看答案及解析

How do we find happiness every single day? How do we get more out of life to the fullest? There are 3 easy ways to enjoy life in daily life.

One way to find happiness within you is to show your appreciation to others. Appreciation not only gives happiness to others but we also receive happiness in return first for writing a letter of appreciation and second for the response we get. I encourage you to take 3 Post-it notes and write one Post-it of appreciation for your classmate, one for your friend and one for your parents and see the happiness you feel within and the joy you receive in return. It doesn’t cost any money; it’s simple and very rewarding.

Often we are too tough on ourselves by telling us we could have done things better. Have a look at your life and evaluate where you are today and what you have achieved. Often we tend to forget the achievements during the journey of our life and we need to be reminded. Take 5 minutes right now to write down what you have achieved in life and what you are proud of. Go over the list and tell yourself what a wond]erful person you are and what a great job you have done.

Have you ever kept a journal? Sometimes writing things down will give us clarity and awareness. When you write down in a journal, you have the ability to express yourself as you truly would like to be. Writing is part of inner peace, which is a road towards happiness. Take 5 minutes every day to write down your ideas and thoughts in your journal. By doing so, you will find inner peace and a sense of happiness.

The 3 easy steps above take only 15 minutes. Not only will it bring happiness to you but also to others.

高三英语其他题中等难度题查看答案及解析

Every week there are amazing things to do in Los Angeles with kids! We’ve collected a list of what we think are the most fun, most interesting family events in LA at the beginning of 2020—and hopefully will result in LA parents and kids having the best time together as a family!

Kids Were Activities

Vroman’s Bookstore　　 695 E. Colorado Blvd, Pasadena, CA 91101

Vroman’s Bookstore is hosting special Kids Week Activities all week long from Monday, Jan. 6th through Friday, Jan. 10th. Different activities are planned each day including an Art Extravaganza (on Tuesday) and Superhero Day (on Wednesday). All activities are free, but reserve in advance to make sure there are enough supplies and materials available for everyone. Check the website for a schedule of events.

Into the Woods

Hollywood Bowl　　 2301 N. Highland Ave., Los Angeles, CA 90068

Enjoy a performance of Into the Woods happening at the Hollywood Bowl on Friday, Jan. 10th (8:00 pm), Saturday, Jan. 11th (8:00 pm), and Sunday, Jan. 12th (7:30 pm). Be a part of “an enchanted world of magic beans, towering giants, and handsome princes.” Tickets are available online.

Family Sandcastle Building Day

Cabrillo Marine Aquarium 3720 Stephen M. White Dr., San Pedro, CA 90731

Head to the Cabrillo Marine Aquarium on Saturday, Jan.11th 10:00 am to 3:00 pm for Family Sandcastle Building Day. Bring your favorite sandcastle building tools and your creativity to this free event.(The sand on the beach will already be thoroughly wet down and ready for creative builders!)

Outdoor Art Moves, Winter 2020 & 826LA@Hammer: Who's Got the Art? Hammer Museum 10899 Wilshire BIvd, Los Angeles, CA 90024

The Hammer Museum is hosting two different special events on Sunday, Jan.12th. At both 11:00 am & 1:00 pm, children aged 5 and above can participate in Outdoor Art Moves, Winter 2020 led by movement director Zoe Rappa -port. Families will“discover relationships between nature, art, and the creative process” during these special movement activities. Free popsicles will be available after the program.

Also happening at 11:00 am is 826LA@Hammer: Who's Got the Art? Children aged 8-14 will help “inspect the galleries, correct clues, and crack the case of a legendary mystery theft." This workshop is designed for up to 20 students, so reservations are encouraged.

1.Which activity needs to be booked in advance?

A.Kids Week Activities. B.The performance Into the Woods.

C.Family Sandcastle Building Day. D.Outdoor Art Moves, Winter 2020.

2.For kids enjoying playing detectives, they can go ______ .

A.695 E. Colorado Blvd., Pasadena

B.2301 N. Highland Ave, Los Angeles

C.3720 Stephen M. White Dr. San Pedro

D.10899 Wilshire Blvd., Los Angles

3.The passage is mainly intended for ______.

A.parents and kids B.artists and directors

C.guides and tourists D.builders and architects

高三英语阅读理解中等难度题查看答案及解析

—Why don't we go for a swim? I hear there are lots of tropical fish.

—_________. I can use my new video camera; it's waterproof.

A.My pleasure B.Good idea

C.It doesn't matter D.You are welcome

高三英语单项填空中等难度题查看答案及解析

There are times when people are so tired that they fall asleep almost anywhere. We can see a lot of people sleeping on the bus or train on their way home __1.__ work in the evening. A man will be reading the newspaper, and seconds later it appears as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger sitting next to him. Another place where __2.__ (plan) short sleep goes on is in the lecture hall __3.__ a student will start snoring so loudly that the professor has to ask __4.__ student to shake the sleeper awake. A more _5.__ (embarrass) situation occurs when a student starts falling into sleep and __6.__ weight of the head pushes the arm off the desk, and the movement carries the rest of the body along. The student wakes up on the floor with no memory of getting there. The __7._ (bad) time to fall asleep is when driving. Police reports are full of accidents that occur when people fall into sleep and go off the road. __8.__ the drivers are lucky, they are not seriously hurt. One woman’s car, for example, went into the river. She woke up in four feet of water and thought that it __9.__ (rain). When people are really tired, __10.__ will stop them from falling asleep — no matter where they are.

高三英语完型填空中等难度题查看答案及解析

We believe that there are educational reforms __________ that will bring a lot of changes for the better.

A. around the clock　　 B. around the edge　　 C. around the corner　　 D. around the date

高三英语单项填空中等难度题查看答案及解析

Young sunflowers turn and swing every day. New findings add to evidence that the plants are animal-like.

Harmer, a professor in the University of California at Davis’ Department of Plant Biology, carried out a series of experiments on sunflowers in the field, in pots outdoors and in indoor growth chambers.

By staking plants so that they could not move, Harmer showed that he could destroy their ability to track the sun. He also noticed that sunflowers prevented from moving were not as tough and leafy as those that were free to move. When plants were moved indoor with a settled overhead light, they continued to swing back and forth for a few days.

The indoor plants did start tracking the “sun” again when the apparent source of lighting was moved across the room. The plants could reliably track the movement and return at night when the artificial day was close to a 24-hour cycle, but not when it was closer to 30 hours.

When sunflowers track the sun, the east sides of their stems grew more rapidly than the west sides. At night, the west sides grew faster as the stem swung the other way. The team identified a number of genes that were expressed at higher levels on the sunward side of the plant during the day, or on the other side at night. A plant growth-regulating hormone, called auxin, appears to be a key driver.

The “dance” to the sun cycle obviously slows when the sunflower matures and its flowers open up. At that point, the plants stop moving during the day and settle down facing the sun in the east.

“Bees like warm flowers.” Harmer said, adding that the bees are cold-blooded, so landing on a warm flower saves them energy and perhaps feels really good.

“The morning warmth changes the flowers in a way to make them more appealing to insects, perhaps causing them to release more attractive scents earlier in the day.” he said. “We’re currently testing this idea.”

1.Why did Harmer do the experiment on sunflowers?

A.To see how sunflowers grow up.

B.To show what sunflowers’ genes are.

C.To study why sunflowers track the sun.

D.To check if sunflowers swing in cloudy days.

2.What does the underlined word “staking”(Par 3) probably mean in ?

A.Tracking. B.Fastening.

C.Preserving. D.Presenting.

3.What is the result of sunflowers being stopped from moving?

A.They won’t grow well.

B.They will grow faster than usual.

C.They won’t swing back though set free.

D.They will produce a number of new genes.

4.What would happen to the sunflowers if they became fully grown?

A.They would swing as usual.

B.They would move back and forth.

C.They would stop turning.

D.They would track the sun.

5.Bees are fond of dancing ______________.

A.on cold sunflowers B.in the circle of flowers

C.on warm sunflowers D.on the mature sunflowers

高三英语阅读理解中等难度题查看答案及解析