All across California, honeybees are flying away from their hives(蜂箱) and dying. Empty hives are causing a lot of worry about some important food crops.
Bees give us a lot more than delicious honey. They are pollinators(授粉者)—they enable plants to produce the fruits and nuts we enjoy by carrying pollen from one plant or flower to the next. The wind pollinates oats, corn, and wheat, but many other plants (like apple and cherry trees and melon vines) depend on insects, bats, and birds. In the U.S., millions and millions of bees kept by human beekeepers fly around doing a lot of this important work for food crops. “Bees are worth protecting because their work adds so much to our diet,” says Dr. Jeff Pettis of the Bee Research Laboratory.
California’s almond (杏仁) crop alone depends on about half the bees in the country. But now the almond crop and many others could be in trouble with so many bees dying.
Researchers at government and university labs all over the country are trying to figure out why so many bees are dying. However, bees are hard to study. Most die away from the hive, so researchers don’t have dead bodies to examine. And when researchers return to a hive after two weeks, about half the bees they studied on their first visit will be dead, replaced by new ones in the natural life cycle of bees. “It isn’t like studying a large animal like a cow that doesn’t move around much and is easy to find out in the cow field,” says Pettis.
Researchers have some ideas about what could be affecting bee health. They could be sick from poisons widely used to kill insects, or they might not be getting enough good food to stay strong. Also, tiny insects called mites feed on bees. “A virus or bacteria could also be doing the killing.” explains Pettis.
【小题1】What is Paragraph 2 mainly about?
A.The wind helps pollinate. |
B.Bees are important in food crops. |
C.Bees give us a lot of delicious honey. |
D.Cherry trees are pollinated by bees. |
A.they move around too much |
B.new bees soon replace all the bees studied by researchers |
C.they are too tiny |
D.they never return to hives |
A.Poisons to kill birds. | B.Eating too much. |
C.Large insects. | D.Some virus. |
A.A large number of bees have died in the hive. |
B.Without bees, some foods would disappear from our diet. |
C.Only researchers in California want to know what kills bees. |
D.Large animals are easier to study than tiny insects. |
【小题1】B
【小题2】A
【小题3】D
【小题4】B
解析试题分析:蜜蜂是人类的好朋友,它们不仅给我们提供美味的蜂蜜,也帮助植物授粉,而且其中加利福尼亚的杏仁作物只能靠蜜蜂授粉才可以结果。所以当地蜜蜂的大量死亡引起了人们的担忧,也促使研究人员努力去找到其中的原因。
【小题1】B推理判断题。文章第二段介绍了蜜蜂除了给人们提供蜂蜜以外,还可以帮助植物授粉,由此判断B选项正确。
【小题2】A 细节理解题。根据文章第四段Pettis说的话“It isn’t like studying a large animal like a cow that doesn’t move around much and is easy to find out in the cow field,”可知蜜蜂难以观察的原因是它们不会呆在固定的地方,所以A选项正确。
【小题3】D细节理解题。根据文章末段“A virus or bacteria could also be doing the killing.”可以判断D选项正确。
【小题4】B推理判断题。根据文章第三段可知某些植物必须依靠蜜蜂授粉,所以如果没有蜜蜂这些植物将不会结果实,由此判断B选项正确。
考点:考查科学知识类短文阅读。
科目:高中英语 来源: 题型:阅读理解
While students in Hainan are quite used to clear skies, Beijing teenagers are not so lucky. As another warm winter approaches, the city can expect the normal clouds of smoke caused by air pollution.
But things may start to improve soon. The government is co-operating with a US-based environmental protection agency to update existing buses and trucks with clean fuel technology. The new technology could reduce air pollutants in existing diesel engines(柴油机)by 40 percent. The programme will begin by testing buses in Beijing to see if the technology can be applied to them.
“We encourage the development of public transports. But at the same time we need to reduce pollution from them, ”said an official.
Efforts are being made to improve the capital’s environment with tighter controls on emissions(排放). Some heavily polluting factories and construction sites, such as those owned by the steel giant Shougang Group, have been asked to cut production in November and December or be closed.
Beijing was the third polluted city in the world at the end of last century, according to the UN. But thanks to recent measures, the capital has made some progress. Last year 224 clear days were rated as having good air quality. In 1998 the air quality index(指数)gave just 100 days as good.
“I am glad to see an improvement, ”said a senior 1 boy living in the northwest of Beijing. “Compared to other places, the air quality of Beijing is still worrying though. I hate pollution. Once I was riding my bike in the morning when I almost had a traffic accident because I couldn’t see a car only metres away from me in fog. ”
In early October, the skies were covered by such a thick fog that a display show by the visiting French Air Force was called off.
Rapid development, industry, traffic fumes and sandstorms from the desert all contribute to the city’s bad air.
【小题1】 The passage is mainly about .
A.a programme aiming at improving Beijing’s air quality |
B.progress made in Beijing’s air quality |
C.Beijing’s air pollution |
D.the differences between Hainan and Beijing |
A.Clean fuel technology will be used in public transports. |
B.Some factories have been asked to cut production. |
C.Some construction sites have been told to be closed. |
D.A display show of airplanes has been called off. |
A.far more still needs to be done |
B.nothing else needs to be done |
C.all traffic has to be closed |
D.the development of the city has to be slowed down |
A.Beijing’s air quality is getting worse and worse. |
B.Rapid development, industry, traffic fumes and sandstorms are all the causes of bad air quality. |
C.People see clouds of smoke in the sky in the winter of Beijing. |
D.The government is making efforts to stop air pollution. |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
(2013·高考新课标全国卷Ⅰ,B)The baby is just one day old and has not yet left hospital.She is quiet but alert (警觉).Twenty centimeters from her face researchers have placed a white card with two black spots on it.She stares at it carefully.A researcher removes the card and replaces it by another,this time with the spots differently spaced.As the cards change from one to the other,her gaze(凝视) starts to lose its focus—until a third,with three black spots,is presented.Her gaze returns:she looks at it for twice as long as she did at the previous card.Can she tell that the number two is different from three,just 24 hours after coming into the world?
Or do newborns simply prefer more to fewer? The same experiment,but with three spots shown before two,shows the same return of interest when the number of spots changes.Perhaps it is just the newness? When slightly older babies were shown cards with pictures of objects (a comb,a key,an orange and so on),changing the number of objects had an effect separate from changing the objects themselves.Could it be the pattern that two things make,as opposed to three? No again.Babies paid more attention to squares moving randomly on a screen when their number changed from two to three,or three to two.The effect even crosses between senses.Babies who were repeatedly shown two spots became more excited when they then heard three drumbeats than when they heard just two;likewise (同样地) when the researchers started with drumbeats and moved to spots.
【小题1】The experiment described in Paragraph 1 is related to the baby’s________.
A.sense of hearing | B.sense of sight |
C.sense of touch | D.sense of smell |
A.the size of cards | B.the colour of pictures |
C.the shape of patterns | D.the number of objects |
A.To reduce the difficulty of the experiment. |
B.To see how babies recognize sounds. |
C.To carry their experiment further. |
D.To keep the babies’ interest. |
A.Science fiction. |
B.Children’s literature. |
C.An advertisement. |
D.A science report. |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
In the second half of each year, many powerful storms are born in the tropical Atlantic and Caribbean seas. Of these, only about a half a dozen generate the strong, circling winds of 75 miles per hour or more that give them hurricane status, and several usually make their way to the coast. There they cause millions of dollars of damage, and bring death to large numbers of people.
The great storms that hit the coast start as innocent circling disturbances (气旋) hundreds — even thousands — of miles out to sea. As they travel aimlessly over water warmed by the summer sun, they are carried westward by the trade winds. When conditions are just right, warm, moist (潮湿的) air flows in at the bottom of such a disturbance, moves upward through it and comes out at the top. In the process, the moisture in this warm air produces rain, and with it the heat that is switched to energy in the form of strong winds. As the heat increases, the young hurricane begins to turn around in a counter-clockwise motion (反时针方向).
The average life of a hurricane is only about nine days, but it contains almost more power than we can imagine. The energy in the heat released (释放) by a hurricane’s rainfall in a single day would satisfy the entire electrical needs of the United States for more than six months.
Water, rather than wind, is the main source of death and destroying in a hurricane. A typical hurricane brings 6-to-12-inch downpours resulting in sudden floods. Worst of all is the powerful movement of the sea — the mountains of water moving toward the low-pressure hurricane center. The water level rises as much as 15 feet above normal as it moves toward shore.
【小题1】An ordinary tropical storm is called a hurricane when ______.
A.it occurs in the Caribbean seas |
B.its winds reach 75 miles per hour |
C.it makes its way to the coastline |
D.its winds begin to circle on the sea |
A.The rough water. | B.The violent winds. |
C.The heat it gives out. | D.The length of its life. |
A.The hurricane is extraordinarily powerful. |
B.The hurricane is used to generate electricity. |
C.The hurricane can otherwise offer an unusual sight. |
D.The hurricane can give people an unforgettable experience. |
A.the low-pressure area in the center of the storm |
B.the force of waves of water |
C.the increasing heat |
D.the trade winds |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
How can we measure animals’ emotions? A new study of animal’s emotions suggests that, as in humans, emotions can tell animals about how dangerous their world is, and guide the choices that they make. The article of the study by Bristol University’s professor Mike Mendl was published online.
An animal living in an environment where it is often threatened by predators(捕食者)will develop a negative emotion or “mood”, such as anxiety. However, one in an environment with plenty of opportunities to get resources for survival will be in a more positive mood state.
The researchers say that these emotional states not only show the animal’s experiences, but also help it decide how to make choices, especially in unclear situations. This could have good or bad results. An animal in a negative mood state will make a safety-first with a “pessimistic” response to an unclear event. For example, it considers a noise in the grass as a signal of the predator. At the same time, an animal in a positive mood state will benefit from a more “optimistic” response. It considers the noise as a signal of prey(猎物).
Professor Mike Mendl, head of the Animal Welfare and Behavior Research Group at Bristol University’s School of Clinical Veterinary Science said, “ We can use “optimistic” or “pessimistic”decision-making as a symbol of an animal’s emotional state. Recent studies by our group and others suggest that this is a meritorious new approach to studying a variety of animal species.”
“Public interest in animal welfare remains high, with widespread concern about the way in which animals are treated, used and included in society. To understand how animals should be treated, we need to better understand their emotional lives,” Mike Mendl said. The researchers believe Mike Mendl’s study can help them to better understand and assess an animal’s emotions.
【小题1】When an animal is in a negative mood state, _______.
A.its response to an unclear event is pessimistic |
B.it will pay little attention to an unclear event |
C.it is easy for it to make right decisions |
D.it has more opportunities to get food |
A.valuable | B.useless | C.fashionable | D.hopeless |
A.the animals with positive emotions live longer |
B.there is no way to assess an animal’s emotions |
C.few people care about animal welfare nowadays |
D.the environment can influence animal’s emotions |
A.tell people to build more protected areas for animals |
B.explain animals should be regarded as people’s friends |
C.raise people’s interest in studying animals |
D.make people know how to treat animals properly |
A.Different kinds of Animals’ Emotions |
B.Emotions Helps Animals to Make Choice |
C.The Living Environment of Wild Animals |
D.The Best Way to Measure Animals’ Emotions |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
Bottled water has become the choice for people who are healthy and thirsty. Bottled water is all over the world. But some say the planet’s health, and people’s health may be suffering from it.
The idea that bottled water is safer for humans may not be true. The Natural Resources Defense Council of America said, “There is no promise that because water comes out of a bottle, it is cleaner or safer than water from the tap.” Another New York City-based action group added that some bottled water is “really just tap water in a bottle—sometimes more clean, sometimes not.”
It is not proven that bottled water is better than tap water. Nick Reeves from the Chartered Institution of Water and Environmental Management said, “The high mineral content (含量) of some bottled water makes them not good for feeding babies and young children.” Also, most bottled water doesn’t have fluoride (氟化物), which can make teeth stronger. Kids are drinking more bottled water and less fluoridated tap water, and some say that’s behind the recent rise in bad teeth.
Storing is another problem. Placed near heat, the plastic bottles can produce bad chemicals (化学物质) into the water.
According to the Environmental Protection Agency, some 2.7 million tons of plastic are used worldwide to bottle water each year. The plastic can take between 400 and 1,000 years to break down.
In terms of energy use, plastic bottles are also not cheap. One report said that if water and soft drink bottlers had used 10 percent recycled materials in their plastic bottles, they would have saved about 72 million gallons of gas.
So, if you are worried about the effect of bottled water on the Earth, you can take the following steps.
● Drink from your tap. Unless your government warns against this, it should be fine.
● Get a container (容器). Carry your tap water in a steel or a lined drinking container, and clean it between uses.
● Keep it cool. Don’t drink from a bottle that has been sitting in the sun, don’t store it near chemicals, and don’t reuse plastic bottles.
● Choose glass containers over plastic if possible. When finished, recycle!
【小题1】What is the main idea of the article?
A.Drinking tap water is the only choice for people. |
B.Glass containers are better than plastic bottles. |
C.Plastic bottles are harmful to the environment. |
D.Bottled water may not be as good as we think. |
A.They break down in less than 300 years. | B.They can be used for many other things. |
C.They are a risk to the environment. | D.They are cheap to make. |
A.no problem for the environment | B.more expensive than tap water |
C.always safer than tap water | D.better for babies |
A.There are a lot of problems storing tap water. |
B.Bottled water can be just tap water in a bottle. |
C.It may be better for your teeth. |
D.It may contain fluoride. |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
In films, dads change from cruel men to loving souls. Here is a list of good and bad movies dads .Atticus Finch in To kill a Mockingbird(杀死一只知更鸟)
GOOD DAD:A man whose wife has died with a young family and a busy job as a lawyer, Gregory Peck's character in the 1962 film is one of the great heroes of American cinema Firm but fair he teaches his children respect and human decency(正派).Harper Lee's novel gets a respectable transposition(转变)to film, thanks to Gregory Peck's perfect performance.
Jack Torrance in The Shining
BAD DAD: When Jack Torrance ,his wife ,Wendy ,and son, Danny ,escaped from the cold winter to the Overlook Hotel we know that Jack has hardly been a model father But when Jack becomes extremely angry and tries to murder his family with an axe, Danny used his intelligence to defeat him and left him to freeze to death.
George Bailey in It's a Wonderful life
GOOD DAD: James Stewart's character is a father-of-four who is saved from the edge of suicide (自杀)and realizes his positive effect on others lives.Much of the film is unpleasant, with George shouting at his children as he faces financial problems. But finally the lovable father realizes the worth of his own life, the value of friendship and the importance of being a loving dad
Darth Vader in The Empire Strikes Back(帝国大厦)
BAD DAD: When the unfriendly cyborg(半机器人)told Luke Skywalker that he was his father ,the son's reaction says it all: "No! No!" It's hardly a joyful welcome to the family. For most of his son's life, Darth Vader has been an absent dad—and he has just cut off Luke's hand You can understand why Father's Day cards might not be available.
【小题1】Who is Harper Lee?
A. An actor. | B. A novelist | C. A movie director. | D. A translator. |
A. Jack Torrance | B. Wendy | C. Danny | D. Darth Vader |
A.To kill a Mockingbird | B.The Shining |
C.It's a Wonderful Lift | D.The Empire Strikes Book |
A.He lost his hand in an accident |
B.His father changed him into a cyborg. |
C.He discovered that he had a cruel father: |
D.His father lived with him for most of his life. |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
The Pacific island nation of Nauru used to be a beautiful place. Now it is an ecological(生态的) disaster area. Nauru’s heartbreaking story could have one good consequence — other countries might learn from its mistakes.
For thousands of years, Polynesian people lived the remote island of Nauru, far from western civilization. The first European to arrive was John Fearn in 1798. He was the British captain of the Hunter, a whaling ship. He called the island Pleasant Island.
However, because it was very remote, Nauru had little communication with Europeans at first. The whaling ships and other traders began to visit, bringing guns and alcohol. These elements destroyed the social balance of the twelve family groups on the island. A ten-year civil war started, which reduced the population from 1,400 to 900.
Nauru’s real troubles began in 1899 when a British mining company discovered phosphate (磷酸盐)on the island. In fact, it found that the island of Nauru was nearly all phosphate, which a very important fertilizer for farming. The company began mining the phosphate.
A phosphate mine is not a hole in the ground; it is a strip mine(带状矿). When a company strip-mines, it removes the top layer(层) of soil. Then it takes away the material it wants. Strip mining totally destroys the land. Gradually, the lovely island of Nauru started to look like the moon.
In 1968, Nauru became one of the richest countries in the world. Every year the government received millions and millions of dollars for its phosphate.
Unfortunately, the leaders invested the money unwisely and lost millions of dollars. In addition, they used millions more dollars for personal expenses. Soon people realized that they had a terrible problem — their phosphate was running out. Ninety percent of their island was destroyed and they had nothing. By 2000, Nauru was financially ruined. Experts say that it would take approximately $433,600,000 and more than 20 years to repair the island. This will probably never happen.
【小题1】What might be the author’s purpose in writing the text?
A.To seek help for Nauru’s problems. | B.To give a warning to other countries. |
C.To show the importance of money. | D.To tell a heartbreaking story of a war. |
A.Rich and powerful. | B.Modern and open. |
C.Peaceful and attractive. | D.Greedy and aggressive. |
A.soil pollution | B.phosphate over mining |
C.farming activity | D.whale hunting |
A.Its leaders misused the money. | B.It spent too much repairing the island. |
C.Its phosphate mining cost much money. | D.It lost millions of dollars in the civil war. |
A.The phosphate mines were destroyed. | B.The leaders will take the experts’ words seriously. |
C.The island was abandoned by the Nauruans. | D.The ecological damage is difficult to repair. |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
Food prices have risen sharply over the past few years. The good news is that the rate of increase has slowed. The bad news is that prices will not go down anytime soon.
Also,the rate of global agricultural production is slowing. Yet it needs to increase 60% over the next 40 years to feed a growing world population.
These are among the findings from the OECDFAO(the Organization for Economic Cooperation and Development & the Food and Agriculture Organization)Agricultural Outlook(展望)2012-2021.
FAO DirectorGeneral Jose Graziano da Silva spoke at a news conference in Rome when the report was released. Mr.Da Silva said that,not surprisingly,the world's poorest people will feel the greatest effects of higher prices.
“For the millions and millions of extremely poor people, the effects of high food prices are clear—they might have to change their diets,usually to ones with poorer nutrition quality, ”he said.
In middleincome countries, people are gaining weight as they eat fewer fruits and vegetables and more of the cheaper but less nutritious foods.
The report also shows that farmers in poorer countries will be leading efforts to feed an expected 9,000,000,000 people by 2050.The outlook predicts that farmers in Latin America,the Caribbean and subSaharan Africa will drive agricultural production in the future.
Angel Gurria,SecretaryGeneral of the OECD,said:“We can feed 9,000,000,000 people by 2050 on this planet. But we have to organize ourselves better.” But there are plenty of challenges.Onefourth of all agricultural land is damaged. Many countries face water shortages(短缺).And experts believe climate change is driving increasingly unusual weather patterns.
The report says farmers need to use more growing methods that can't cause damage to the environment.At the same time,it says governments should end economically harmful supports and spend more money to increase agricultural production.Mr.Gurria says rich and poor nations need to treat agriculture more like a business.
“In many cases,agriculture is related in people's minds to the poorest. It's related to aid. It's related to very poor living conditions,etc. We have got to shake that image away,”he said.
【小题1】Why are people gaining weight in countries with average incomes?
A.They eat more food. | B.They eat less nutritious foods. |
C.They eat cheaper fruits. | D.They eat cheaper vegetables. |
A.are damaging a great part of their agricultural land |
B.will play a great role in feeding the growing world population |
C.are spending lots of money increasing agricultural production |
D.will not be so seriously affected by food prices as rich nations |
A.Improving the growing methods. |
B.Finding more agricultural land. |
C.Preventing governments' involvement. |
D.Improving farmers' living conditions. |
A.Agriculture means difficulty and sadness. |
B.Food prices will go down in the near future. |
C.It's almost impossible to feed 9,000,000,000 people by 2050. |
D.Both rich and poor countries should take agriculture seriously. |
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com