Many scientists believe that global warming, ...

Many scientists believe that global warming, if       , will cause extreme climate changes this century.

A．not stopping         B．no stop             C．not stopped         D．without stop

高三英语单项填空简单题查看答案及解析

Now scientists believe that global warming affects hibernating(冬眠的) animals, causing them to wake up earlier. While this may seem a little concern, it is in fact a significant environmental problem. The shortened hibernation (冬眠) period could actually lead to significant declines in the populations of several species.

Some of the first concrete evidence of the phenomenon came from Colorado, where researchers at the Rocky Mountain Biological lab have been observing marmot（旱獭） hibernation behavior since the 1970s. In the early days of their studies, marmots generally hibernated several weeks into the month of May. Nowadays, however, temperatures in the area have risen by 2.5 degrees Fahrenheit(华氏度), and the marmots are waking up about a month earlier.

At least the marmots are still hibernating. Several other animals have not been hibernating at all recently. Brown bears in the Spanish Cantabrian Mountains did not hibernate last year. In parts of the United States, chipmunks （花鼠） also skipped the hibernation period. The bears seem to have survived without losing many individuals. The chipmunks, however, were not so lucky. Many of the animals died of starvation during the winter.

The problem with animals waking up early, or skipping hibernation altogether, lies with the creatures’ metabolism（新陈代谢）. When an animal hibernates, their metabolism drops significantly. The animals’ heart rate slows, and they require very little energy to live. When the animals awake from their winter slumber, their metabolism returns to normal.

But while their metabolism may be as active as it was before hibernation, food sources aren’t as available as they were before. A marmot may wake up when temperatures get warmer, thinking it’s spring, but plants will not have gotten the amount of sun they need to signal their spring period of growth. So until the plants grow, the marmots have no reliable food source.

Many scientists believe the problem will continue to get worse. In addition to changes in hibernation patterns, some believe that other animals will also begin to change their migration patterns or begin to give birth earlier. For many biologists, that’s a scary prospect. Terry Root, an animal expert at Stanford University, said: “I do think what we will be facing is the extinction of many species."

1.What is the viewpoint of the writer?

A. Global warming will continue to get worse as time goes on.

B. Global warming will lead to shortened hibernation of some animals.

C. Shortened hibernation will result in declines in the population of animals.

D. Some animals will skip hibernation altogether.

2.The writer sets the example of the marmot so as to ________.

A. explain that global warming influences animals’ hibernation

B. indicate that the weather gets warmer and warmer now

C. show that the weather in the United States is quite different

D. say some animals do not hibernate now due to warm weather

3.Why can’t marmots find enough food when they wake up?

A. Because there are too many marmots in the wild now.

B. Because plants haven’t received enough sunlight for spring growth.

C. Because winter days end much earlier than before.

D. Because more and more animal species skip hibernation now.

4.Terry Root holds a(n) ________ attitude towards the future of animals.

A. optimistic        B. doubtful        C. pessimistic        D. sensitive

高三英语阅读理解中等难度题查看答案及解析

Now scientists believe that global warming affects hibernating animals, causing them to wake up earlier. _______ this may seem a little concern, it is in fact a significant environmental problem. The _______ hibernation period could actually lead to significant declines in the populations of several species.

Some of the first concrete evidence of the _______ came from Colorado, where researchers at the Rocky Mountain Biological lab have been observing marmot (旱獭) hibernation behavior since the 1970s. In the early days of their studies, marmots generally hibernated several weeks into the month of May. Nowadays, _______, temperatures in the area have risen by 2.5 degrees Fahrenheit, and the marmots are waking up about a month _______.

At least the marmots are _______ hibernating. Several other animals have not been hibernating at all recently. Brown bears in the Spanish Cantabrian Mountains did not hibernate last year. In parts of the United States, chipmunks (花鼠) also _______ the hibernation period. The bears seem to have _______ without losing many individuals. The chipmunks, however, were not so _______. Many of the animals died ________ starvation during the winter.

The problem with animals waking up early, or skipping hibernation altogether ________ the creatures' metabolism (新陈代谢). When an animal hibernates, their metabolism drops significantly. The animals' heart rate ________, and they require very little energy to live. When the animals awake from their winter slumber (睡眠), their metabolism returns to ________.

But while their metabolism may be as active as it was before hibernation, food sources aren't as ________ as they were before. A marmot may wake up when temperatures get ________, thinking it's spring, but plants will not have gotten the amount of sun they need to signal their spring period of growth. So until the plants grow, the marmots have no ________ food source.

Many scientists believe the problem will continue to get ________. ________ changes in hibernation patterns, some believe that other animals will also begin to change their migration patterns or begin to give birth earlier. For many biologists, that's a ________ prospect. Terry Root, an animal expert at Stanford University, said: "I do think what we will be facing is the ________ of many species."

1.A.When B.But C.While D.So

2.A.increased B.shortened C.declined D.spread

3.A.phenomenon B.atmosphere C.circumstance D.situation

4.A.but B.so C.therefore D.however

5.A.later B.earlier C.longer D.before

6.A.still B.thus C.never D.not

7.A.entered B.failed C.skipped D.lost

8.A.died B.lived C.survived D.existed

9.A.delighted B.lucky C.mild D.refreshed

10.A.from B.in C.with D.of

11.A.lie down B.lie with C.get into D.get along with

12.A.decreases B.slows C.stops D.falls

13.A.abnormal B.average C.ordinary D.normal

14.A.available B.rich C.full D.enough

15.A.hotter B.better C.cooler D.warmer

16.A.steady B.reliable C.casual D.fixed

17.A.unfortunate B.harmful C.disappointed D.worse

18.A.In addition to B.As a result of C.Due to D.In spite of

19.A.desperate B.hopeful C.scary D.eager

20.A.survival B.tendency C.existence D.extinction

高三英语完形填空中等难度题查看答案及解析

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.

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Experts warn that global warming will cause extreme climate changes including more______　　　　 floods, heat waves and droughts.

A. usual　　　　 B. ordinary　　　　 C. frequent　　　 D. common

高三英语单项填空中等难度题查看答案及解析

Experts warn that global warming will cause climate changes, including more ______ floods, heat waves and droughts.

A. frequent             B. usual                                 C. ordinary                     D. common

高三英语单项填空简单题查看答案及解析

(2013·浙江温州二模)Scientists have found evidence ________ global warming caused the world's first horses to become smaller nearly 50 million years ago.

A．what      B．that

C．which      D．whether

高三英语单项填空中等难度题查看答案及解析

If you believe in thermometers（温度计）,you should believe in global warming. And if you believe in eating fries with your burger, you should worry more about carbon emissions.

It won't happen overnight, but as the planet's climate changes, the growth cycles of main crops will all be heavily affected .Here are three of the crops that might not beat the heat.

The potato actually needs a great deal of beauty rest to develop properly. “They need a cool nighttime temperature in order to start growing the tuber, the part that we eat,” Nelson says.

Temperature and altitude are two primary concerns in coffee growth, and farmers are stuck between a rock and a hard place. “We know that coffee grows in a certain temperature range,” Nelson says. “They've been moving up the mountains, but at some paint you run out of mountains to move up.” Higher-grade strains of Arabica coffee in Central American regions are at particular risk due to the need for lower growing temperature, especially since diseases and pests are also becoming more of a factor as temperatures rise.

Even if you're looking at the direct effects of temperature alone, rice is in trouble. “As nighttime temperatures go up ,the rice is going to have a problem flowering and won't make as many seeds,” Nelson says. In addition to this direct heat consequence, rising sea levels will flood many rice fields and destroy water salinity levels, while droughts will lower production, raise prices, and further shame westerners who are too clumsy with chopsticks to be able to clear their plates once a new grain is adopted.

1.What is the closest meaning to the underlined word “emissions” in Paragraph 1?

A. Mixture.　　 B. Pollution.

C. Going down.　　 D. Letting off.

2.What does the potatoes' development need according to Nelson?

A. Enough water and salt.　　 B. Cool temperature at night.

C. Much sunshine and fresh air.　　 D. Sudden rise of the temperature.

3.The rice is difficult to flower, probably because______.

A. sea levels go up suddenly　　 B. the temperature rises at night

C. many seeds can't be produced　　 D. both temperature and altitude rise

4.What is the best title for the text?

A. How Does Global Warming Affect Westerners

B. How Does The Cool Temperature Affect Ride

C. What Is The Real Reason For Crops' Growth

D. Three Crops That Won't Survive Minor Climate Changes

高三英语阅读理解中等难度题查看答案及解析

Most scientists are now certain that global warming is taking place．Gases such as carbon

dioxide produced by burning of coal, oil, wood, together with industrial pollution, are creating a

warm blanket around the earth．This blanket is trapping heat in the atmosphere and so raising the

temperature of the earth.

The evidence for global warming can now be seen in the world’s changing climate statistics．In

Europe, eight of the last ten years have seen record high temperature．For northern Europe, this has

generally been a change for the better．Gardens can even now grow tropical（热带的） plants in

England, though London may never see a “White Christmas” again．On the other hand, the

countries around the Mediterranean Sea, and those south of the Sahara desert 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 the Americas, the climate is becoming more extreme ---the summers are

getting hotter and hotter and the storms are becoming more violent．In 1999 the southern United

States was struck by a series of destructive hurricanes, while the end of 1999 saw the worst floods

ever in Venezuela．Meteorologists（气象学家） expect such trends to continue, and indeed to

worsen, if global warming cannot be halted(终止).

In addition to worrying about rising global temperatures and more extreme weather conditions,

scientists are closely monitoring（监测）sea levels around the world．These 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, such as the coral islands in the Pacific, and Bangladesh where the River Ganges already folds the delta(三角洲) every year．Already parts of these places are disappearing under the rising tides.

Title: Global Warming

高三英语任务型阅读中等难度题查看答案及解析

It is already well understood ________ causes the global warming.

A. what     B. when    C. that       D. how

高三英语单项填空中等难度题查看答案及解析