题目
题型:不详难度:来源:
Global warming is having a great effect on hundreds of plant and animal species around the world, changing some living patterns, scientists say.
Increased carbon dioxide(CO2)in the air from burning coal and oil can have an effect on how plants produce oxygen, while higher temperatures and changeable rainfall patterns can change their patterns of growth.
“Predicting species’ reaction to climate change is a major challenge in ecology,” said the researches of several U.S. universities. They said plants had been the key object of study because their reaction to climate change could have an effect on food chains and ecosystem services.
The study, published on the Nature website, uses the findings from plant life cycle studies and experiments across four continents and 1,634 species. It found that some experiments had underestimated(低估)the speed of flowering by 8.5 times and leafing by 4 times.
“Across all species, the experiments under-predicted the speed of the advance — for both leafing and flowering — that results from temperature increases,” the study said.
The design of future experiments may need to be improved to better predict how plants will react to climate change, it said.
Plants are necessary for life on the Earth. They are the base of the food chain, using photosynthesis(光合作用)to produce sugar from carbon dioxide and water. They let out oxygen which is needed by nearly every organism on the planet.
Scientists believe the world’s average temperature has risen by about 0.8℃since 1900, and nearly 0.2℃ every ten years since 1979.
So far, efforts to cut emissions(排放)of planet-warming greenhouse gases are not seen as enough to prevent the Earth heating up beyond 2℃ this century — a point scientists say will bring the danger of a changeable climate in which weather extremes are common, leading to drought, floods, crop failures and rising sea levels.
小题1:What is the key information the author wants to give in Paragraph 1?
A.Plants’ reaction to weather could have damaging effects on ecosystem. |
B.The increasing speed of flowering is beyond scientists’ expectation. |
C.Climate change leads to the change of food production patterns. |
D.Food chains have been seriously damaged because of weather. |
A.plants’ flowering is 8.5 times faster than leafing |
B.there are 1,634 plant species on the four continents |
C.scientists should improve the design of the experiments |
D.the experiments failed to predict how plants react to climate change |
A.they can prove the climate change clearly |
B.they are very important in the food chains |
C.they play a leading role in reducing global warming |
D.they are growing and flowering much faster than before |
A.It has risen nearly 0.2℃ since 1979. |
B.Its change will lead to weather extremes. |
C.It is 0.8℃ higher in 1979 than that of 1990. |
D.It needs to be controlled within 2℃ in this century. |
答案
小题1:B
小题2:C
小题3:B
小题4:D
解析
【本文要点】本文为科普类文章。文章论述了全球变暖的气候环境会让植物提前生长开花,进而影响整个食物链及生态系统。
小题1:第一段话给读者传达的主要信息存在于主句,而不是which所引导的定语从句上。根据“Plants are flowering faster than scientists predicted”可知,作者是要告知读者植物开花的增速超出了科学家的预期。故选B。A为次要信息。
小题2:第五段话“It found that some experiments had underestimated(低估)the speed of flowering by 8.5 times and leafing by 4 times”暗示读者:对于植物所设计的实验应该有所改进,故答案选C。
小题3:根据第四段“They said plants had been the key object of study because their reaction to climate change could have an effect on food chains and ecosystem services”可知植物对气候变化的反应对整个食物链和生态系统都至关重要。故答案选B。
小题4:从倒数第二段“…has risen by about 0.8℃ since 1900, and nearly 0.2℃ every ten years since 1979”可知A、C项错误;从最后一段叙述可知,如果本世纪地球变暖超过2℃,便会出现weather extremes。暗示我们这个世纪地球温度的上升需要控制在2℃的范围之内。故答案选D。
核心考点
试题【Plants are flowering faster than scientists predicted(预测)in reaction to climate 】;主要考察你对科普环保类等知识点的理解。[详细]
举一反三
Hello ,everyone!Thank you very much for coming to this concert. I hope you have enjoyed the performance. As you may know, all the performers have given their time to help us.
This concert is to raise money for children in Africa. Every day hundreds of children in Africa die because they don’t have enough to eat. There are two reasons. First, there is no work for the children’s parents. Second, the governments in many African countries do not have the money to help the poor.
Most African countries are poor. The land is not good for growing food and the weather is also bad for farming. The Feed Africa Fund spends millions of dollars every year on food for poor people in Africa. This money comes from people like you---- kind, generous people who do not want to see children die from hunger.
Every dollar you give this evening will go to the Feed Africa Fund. Just one dollar can buy enough food to feed a family of four for three days. Think about it: only one dollar can feed four people for three days.
How much do you spend on food every day? Ten dollars? Twenty dollars? I am sure you can spend a little less on your own food so that you have a few dollars for the Feed Africa Fund.
Please be kind and generous! Give your money with a helping hand. Your money can make a difference in others’ life and yours. Thank you!
小题1:
In the speech , the biggest problem in many African countries is______.A.hunger | B.the poor land | C.the bad weather | D.water pollution |
小题2:
The speaker is trying to help the audience believe that__________.A.things will be better soon | B.they should spend less money on their food |
C.the concert is really wonderful | D.their money will help a lot |
小题3:
The Chinese meaning for “generous” is ______.A.聪明的 | B.慷慨的 | C.富裕的 | D.明智的 |
小题4:
The Feed Africa Fund is a(n)_______.A.group that travels in Africa |
B.programme at the concert to help the poor |
C.organization that offers food to African countries |
D.activity to help poor children to go to school |
小题5:
If a person gives five dollars, the money will be able to feed four people for ______.A.three days | B.six days | C.ten days | D.fifteen days |
Monday Tuesday Wednesday Thursday Friday
8:10 English Eng lish Math Spanish Biology
9:00 Math Math Self-study Math Self-study
10:00 Biology Biology Spanish Art Math
10:40 Self-study Art P.E. Biology English
12:20 Lunch Lunch Lunch Lunch Lunch
1:10 P.E. Self-study English Self-study P.E.
2:00 Spanish Spanish Biology English Spanish
小题1:They have _______ lessons at 10:00 on Wednesday morning.
A.art | B.Biology | C.Spanish | D.P.E. |
A.8:10 | B.9:00 | C.9:50 | D.10:40 |
A.At 9:00 | B.At 10:00 | C.At 2:00 | D.At 10:40 |
A.biology | B.Spanish | C.math | D.English |
The program will get families , schools , news papers , magazines and TVs to join together and deal with the students obesity so that students will be at a healthier weight . The program includes : Food stores should sell healthier foods . Schools should serve healthier meals with less fat and should also offer gym classes .
The lady is trying to fight the students’ obesity all over the country because it can cause illnesses and higher cost . She wants the students to eat right, exercise more and control their weight . She also wants the students to understand it is important to have less sweet food , and drink water , milk and fresh juices , but not to choose cokes .
The health program is really helpful to the students today and in the future . As she says , we can’t always build the future for our youth , but we can built youth for the future .
小题1:In Michelle’s country over of the students are too fat .
A.75% | B.a quarter | C.a half | D.25% |
A.厌食症 | B.抑郁症 | C.肥胖症 | D.强迫症 |
A.To offer gym classes . |
B.To plant a vegetable garden . |
C.To serve meals with less fat . |
D.To sell healthier foods . |
A.The lady introduces health drinks . |
B.The lady cares about food cost . |
C.The lady fights obesity in students . |
D.The lady feels worried about the height . |
Green fashion is about making(and wearing)clothes that are good for humans,animals,and the Earth.In the past,green fashion made people think of hippies(嬉皮士)and ugly clothes.But today,green fashion is different.It is about looking good and caring about the Earth and other people.You can have interesting clothes and be green.
Around the world,green fashion is becoming popular.For example,the U.K.company
People Tree sells men’s and women’s clothing and accessories(饰品).They are made from
natural fabrics(织物)like cotton and wool.Workers who make the clothes are from countries like Nepal,Kenya,and Bangladesh.People Tree pays the men and women good money for the clothes they create.
Singer Bono and his wife also started a clothing company called EDUN.When the clothes sell,EDUN uses most of the money to help people around the world.
小题1:According to the passage,what is“green fashion”?
A.Wearing the color green all the time. |
B.Making clothes from green trees. |
C.Putting green make-up on your face. |
D.Wearing clothes that are good for the Earth. |
A.Most use natural fabrics to make clothes. |
B.Many do not pay their workers well. |
C.They make clothes mostly for women. |
D.Most of the companies are in Africa. |
A.It teaches children to make clothes. |
B.It sells clothes and uses the money to help people. |
C.It gives clothes to poor people. |
D.It makes expensive clothes for teenagers. |
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