题目内容
Honeybees
Honeybees can do three kinds of jobs.
It is one of the most unusual insects in the world. Bees are special be
cause they divide up their honeybee work. Each bee has a certain job to do.
The busiest bee is the worker. Workers build the nest, called a hive. Inside the hive, workers make a honeycomb from wax(蜂蜡). They store honey there for food. Workers are always cleaning and fixing the hive. They even stand at the opening and fan their wings to cool the hive. Worker bees will attack anything—even people—to keep their hive safe.
Another kind of bee is the drone(雄蜂). Drones are male bees, and their job is to fly 
with the queen bee and mate with her. After the queen mates, the worker bees drive the drones away. The drones then starve to death.
The third kind of bee is the queen. Each hive needs only one queen, and her job is laying eggs. She can lay as many as 2, 000 eggs a day.
【小题1】The bee’s nest is called a _______.
| A．hive | B．honeycomb | C．drone | D．wax |
| A．They lay 2, 000 eggs each day and build a nest. |
| B．They mate with the queen bee and then starve. |
| C．They clean the hive and keep it cool. |
| D．They attack the queen bee. |
| A．are very dangerous insects |
| B．will attack anything or anyone to protect the hive, if necessary |
| C．are like any other insect that flies |
| D．eat each other as food |
| A．it attacked the workers | B．it is no longer needed in the hive |
C．the queen bee has died | D．it ate the queen bee |
【小题1】A
【小题1】C
【小题1】B
【小题1】B
解析
英才点津系列答案
红果子三级测试卷系列答案With the development of society and economy, animals and their habitats are getting pushed aside as households decrease in size and increase in number.
Small numbers of people per household on average use more energy and goods per person. Greater numbers of households require more natural resources for construction. The possible result of this problem may be insufficient natural resources to meet consumer demand without endangering habitats important to biodiversity.
Personal freedom and social choice may come at huge environmental cost. Direct costs include visible damage to animal habitats and plant life. Indirect costs include the release of more greenhouse gases.
The effects of such “personal freedom and social choice” have already surfaced in south-west China’s Wolong Nature Reserve. In Wolong, they found that a reduced average household size was directly tied to an increase in homes, and thus an increase in the amount of firewood consumed for cooking and heating. The rise in wood fuel use has contributed to disappearance of forests and to the loss of habitats for giant pandas.
Curious about whether other parts of the world were experiencing similar phenomena, they got the support of a team of researchers including Stanford’s Paul Ehrlich, well-known for his population studies, to find out the household dynamics in 141 countries between 1985 and 2000. Their study proved that the difficult choice of Wolong is part of a global trend.
In the 76 countries considered biodiversity “hotspots”, such as the United States, Brazil, Australia, and Kenya, the number of households grew by 3.1% every year, while the population increased just 1.8%. Meanwhile, the number of people per home dropped from 4.7 to 4.0. The decline in household size has resulted in 155 million additional households in hotspot countries, almost always limiting biodiversity.
In the 10 non-hotspot countries — those without high-density areas of animal and plant species — similar results were found, though on a lesser scale. Even in countries experiencing population decline, such as New Zealand, the number of households still increased because of a reduction in household size.
【小题1】What does the underlined word “insufficient” mean?
| A．Plenty of. | B．Not enough. | C．Abundant. | D．Little. |
| A．is facing the same threat as many other parts of the world |
| B．sets a good example in protecting animals |
| C．is a place where giant pandas and their habitats are not affected |
| D．is a place where animals and their habitats are seriously damaged |
| A．Biodiversity is better kept in countries with smaller populations. |
| B．Biodiversity is better kept in hotspot countries. |
| C．The threat to nature from reduction in household size is a worldwide problem. |
| D．Both hotspot countries and non-hotspot countries face the threat of the same scale. |
| A．Reduced household size leads to an increase in household number. |
| B．Modern homes consume more natural resources. |
| C．How to meet consumer demand without endangering animals and their habitats. |
| D．Reduction in household size as well as increase in household number threatens nature. |
If your mother wants to tell you something, she uses words. Birds can not talk as we do. But some birds can make sounds to warn their young of danger. They have their own ways to make the young birds do certain thing.
The jackdaw is a kind of blackbirds that lives in Europe. Jackdaws live together in flocks. ( 群) Yong jackdaws do not know their enemies. When an older jackdaw sees a dog , it makes a loud tattling (格格响的)sound.The young birds know this sound means an enemy is nearby. The sounds warns them to know their enemy.
If a young jackdaw is in a dangerous place, a jackdaw parent flies over him from behind.The parent bird flies low over the young bird’s back, the parents’ tail feathers move quickly from side to side, It is trying to say, “ Follow me.”
At the same time , the parent calls out, “ Key-aw ,Key-aw.” The parent means, “ Fly home with me.” The young bird then follows the older one home.
Young jackdaws do not have to learn what certain sounds mean.They know the meaning of these sounds from the time they hatch.
【小题1】The jackdaw lives in _____ .
| A．Europe | B．Australia | C．America | D．Africa |
| A．calls out “Follow me .” | B．makes a loud sound |
| C．flies away | D．fights the dog . |
| A．ask their young to follow them | B．play a game with the young |
| C．tell the meal time | D．give a warning of a fire |
| A．the danger of jackdaws. |
| B．in which mother can talk to their children. |
| C．the way jackdaws warn their young of danger. |
| D．how the jackdaws are living. |
| A．All animal parents can talk to their young. |
| B．Dogs are the most dangerous enemies for jackdaws. |
| C．Young jackdaws know the meaning of their parents’ sound when they grow older . |
| D．Some birds can give certain information to one another. |
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【小题1】 How long does it take the battery to charge up an iPhone?
| A．15 minutes. | B．30 minutes. | C．1.5 hours. | D．3 hours. |
| A．It is built in an iPhone. | B．It is the smallest of its kind. |
| C．It can also be used as a charger. | D．It keeps power for about 30 days. |
| A．may get your pre-paid money back with any reason |
| B．can demand an apology and the money back within 30 days |
| C．have the privilege of one-month return without any reason |
| D．are probably unable to have the return privilege with a return label |
A. P.S. B. B.L. C. M.C. D. T.K.
【小题5】The customer comments on the battery are mainly about its _______.
| A．quality | B．service | C．function | D．shopping |
No one can change the weather. Nobody can control the weather. But if we read correctly the signs around us, we can tell what the more important changes in the weather will be. This way of telling what the weather will be like on the following day or two is called weather forecasting(天气预报).
For many centuries and in all countries, people have studied the weather and tried to make weather forecasting. Rings around the sun are a sign of coming rain. That many people feel their joints(关节) hurt is a sign of wet weather. Some birds fly high if fine weather is coming, but they fly near the ground if rainy or stormy weather is on the way. If you see a rainbow during rainy weather, this is a sign that the weather will become clear and fine. Such rainbows come in the evening. If the stars twinkle clearly at night, then fine weather will continue. If a fog appears in the morning just above a river, then the day will be warm. If the sunset is mostly red in colour, then the following day will be fine. If a rainbow appears in the morning, rainy weather will probably come.
Most of the above sayings have been made by the people who have used their eyes and brains to make weather forecasting.
【小题1】Which of the following can be used here to replace(取代) the underlined phrase “on the way”?
| A．away. | B．gone. | C．disappearing. | D．coming. |
| A．warm | B．rainy | C．clear and fine | D．cold |
| A．A rainbow appears in the morning. |
| B．Some birds fly high. |
| C．The stars twinkle clearly at night. |
| D．Fogs appear in the morning just above a river. |
Can people change their skin color without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin color.
The gene comes in two versions, one of which is found in 99 per cent of Europeans. The other is found in 93 to 100 per cent of Africans, researchers at Pennsylvania State University report in the latest issue of Science.
Scientists have changed the color of a dark-striped zebrafish（斑马鱼） to uniform gold by inserting a version of the pigment (色素) gene into a young fish. As with humans, zebrafish skin color is determined by pigment cells, which contain melanin (黑色素). The number, size and darkness of melanin per pigment cell determine skin color.
It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation (变异) in the gene for melanin production. This results in less pigmented skin.
However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes.
Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun (太阳光紫外线), which can cause skin cancer.
But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng.
Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin color, said Cheng.
The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin color without damaging it like chemical treatment did on Michael Jackson.
【小题1】 The passage mainly tells us that ________.
| A．people can not change their skin color without any pain |
| B．the new discovery could lead to research into ways to change skin color safely |
| C．pop king Michael Jackson often changed his skin color as he liked |
| D．scientists have found out that people’s skin color is determined by the gene |
| A．nowadays people who want to change their skin color have to suffer a lot from the damage caused by the chemical treatment |
| B．Europeans and Africans have the same gene |
| C．the new discovery could help to find medical treatments for skin cancer |
| D．there are two kinds of genes |
| A．find the different genes of humans’ |
| B．prove the humans’ skin color is determined by the pigment gene |
| C．find out the reason why the Africans’ skin color is dark |
| D．find out the ways of changing people’s skin color |
| A．they are born light-skinned people |
| B．light-skinned Europeans have mutation in the gene for melanin production |
| C．they have fewer activities outside |
| D．they pay much attention to protecting their skin |
| A．neutral（中立的） | B．negative | C．positive | D．indifferent（冷漠） |
The Internet will open up new vistas (前景), create the global village——you can make new friends all around the world. That, at least, is what it promised us. The difficulty is that it did not take the human mind into account. The reality is that we cannot keep relationships with more than a limited number of people. No matter how hard the Internet tries to put you in communication, its best efforts will be defeated by your mind.
The problem is twofold（双重的）. First, there is a limit on the number of people we can hold in mind and have a meaningful relationship with. That number is about 150 and is set by the size of our brain. Second, the quality of your relationships depends on the amount of time you invest in then. We invest a lot in a small number of people and then distribute what’s left among as many others as we can. The problem is that if we invest little time in a person, our engagement with that person will decline until eventually it dies into “someone I once knew”.
This is not, of course, to say that the Internet doesn’t serve a socially valuable function. Of course it does. But the question is not that it allows you to increase the size of your social circle to include the rest of the world, but that you can keep your relationships with your existing friends going even though you have to move to the other side of the world.
In one sense, that’s a good thing. But it also has a disadvantage. If you continue to invest in your old friends even though you can no longer see them, then certainly you aren’t using your time to make new friends where you now live. And I suspect that probably isn’t the best use of your time. Meaningful relationships are about being able to communicate with each other, face to face. The Internet will slow down the rate with which relationships end, but it won’t stop that happening eventually.
【小题1】The number of friends we can keep relationships with is decided by______.
| A．the Internet | B．the time we have | C．the place we live | D．the mind |
| A．appointment | B．connection | C．interview | D．agreement |
| A．the Internet helps to keep in touch with friends far away |
| B．the Internet determines the quality of social relationships |
| C．the Internet greatly increases the size of social circles |
| D．the Internet is of no value in social communication |
| A．To keep in touch with old friends when we have moved away. |
| B．To chat with friends often on the Internet. |
| C．To make more new friends face to face. |
| D．To stop using the Internet to make new friends. |
| A．He thinks it useless | B．He is hopeful of it. |
| C．He approves of it. | D．He doubts it. |
Malaria, the world’s most widespread parasitic (寄生虫引起的)disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don't (or can’t) seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the Gambia, no family, village, hospital, or workplace can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect. They can also attach themselves to blood vessels in the brain. If it doesn’t kill you, malaria can happen again and again for years. The disease is passed on to humans by female mosquitoes infected with one of four species of a parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease's spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply a
nd are very expensive. If these drugs should fail, nobody knows what would come next.
【小题1】According to paragraph 1, many people don’t seek care because ________.
| A．they are too poor |
| B．it is unusual to seek care |
| C．they can remain unaffected for long |
| D．there are too many people suffering from the disease |
| A．have to kill female mosquitoes | B．have ability to defend parasites |
| C．have their red blood cells infected | D．have sudden fever, followed by chills |
| A．Its resistance to global warming. |
| B．Its ability to pass on the virus frequently. |
C．Its outbreaks in citi es with large populations. |
| D．Its ability to defend itself and resist new drugs. |
| A．no drugs have been found to treat the disease |
| B．the alternative treatment is not easily available to most people |
| C．malaria has developed its ability to resist parasites |
| D．nobody knows what will be the drug to treat the disease |
Some of the planet’s most precious animals and plants are disappearing, according to the World Conservation Union (IUCN). The group, based in Switzerland, works with governments and experts to protect threatened species. On September 12, the IUCN released its Red List, a list of species at greatest risk of extinction.
The list includes 41,415 animals and plants. The IUCN says that habitat destruction, hunting and other causes threaten one in four mammals, one in eight birds and one in three amphibians(两栖动物).
Who is to blame?
Scientists believe that 99 percent of threatened species are at risk because of human activity. “We are losing animals and plants at a high rate,” says Julia Marton-LefEevre, director general of the IUCN. “We need to change our behavior.” Warmer oceans and over-fishing are changing sea life. This year for the first time corals(珊瑚) made their appearance on the list. The gharial, a crocodile living in India and Nepal, has lost almost 60 percent of its population in the last 10 years. It is a victim（受害者）of habitat destruction.
Still, the news is not all bad. Thanks to efforts made to protect it, the Mauritius echo parakeet, a bird once endangered, has seen an increase in its population. “This shows that protection methods can work,” says Marton-LefEevre. “That’s the message we want to send to young people.”
In China the new reserve（保护区）itself is part of green efforts that have seen more than 2,400 nature reserves of various kinds being set up, covering more than 15 percent of the nation’s land area, official figures showed.
"The country’s natural resources(资源) have benefited from conservation," said Lei Guangchun, director of the nature reserve department of Beijing Forestry University. "It is a big increase nowadays compared with other countries." Lei said.
The total areas of China’s natural reserves have covered 1.38 million km2, which accounts for 15.4% of China’s area, higher than both the world average（平均水平） of 11% and the rate in most developed countries.
Li Zhong, an official in charge of the nature reserves office with the State Forestry Administration, thought it was important to increase investment（投资） in such reserves at all levels.
【小题1】What do we know about the IUCN?
| A．A union for listing animals and plants on the earth |
| B．A group of volunteers who are interested in wildlife |
| C．An organization concerning the protection of rare species’ survival |
| D．A government made up officials, scientists and experts |
| A．All the protection methods can’t work. |
| B．The IUCN does most of the protection. |
| C．The efforts China makes has paid off. |
| D．Enough is done in wildlife protection. |
| A．Bad weather | B．Over-hunting | C．Warmer oceans | D．Habitat destruction |
| A．China has been paying great attention to protecting the natural resources. |
| B．China has set up a lot of natural reserves. |
| C．The natural reserves in China cover more than 15 percent of the nation’s land area. |
| D．The rate of China’s natural reserves is lower than the average of the world. |