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Which animal is called "the nation treasure" of Australia？
A．Kangaroo.
B．Koala.
C．Emu.
D．Lyrebird.
答案
更多“Which animal is called "the nation treasure" of Australia？A．Kangaroo.B．Koala.C．Emu.D．Lyreb”相关的问题
第1题
A Special Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock(51)plants when to form. flowers and when the flowers should open. It tells insects when to(52) the protective cocoon (防护卵袋) and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal(53)the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur because of the(54)of hours of daylight. In the short(55)of winter, its fur becomes white. The fur becomes gray brown in(56)in the longer hours of daylight in summer.
Inner signals control other(57)clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration(58)twice each year. Birds(59)from flying become restless when it is time for the trip,(60)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(61)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(62)to control the timing of some of our actions. These(63)tell a person when to wake, when to(64)and when to seek food. Scientists say there probably are other biological clock cells that(65)other body activities.
A．says
B．asks
C．tells
D．talks
第2题
We call the relation between "animal" and "cow" as
A．polysemy.
B．antonymy.
C．homophony.
D．hyponymy.
第3题
One of the ways to find an animal welfare organisation is to ______.
A．make a phone call
B．write to the organisation
C．meet the manager of the organisation
第4题
A Biological Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells(51)when to form. flowers and when the flowers should open. It tells(52) when to leave the protective cocoons and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animal(53) the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur(54) the number of hours of daylight. In the short(55) of winter, its fur becomes white. The fur becomes gray brown in color in the longer hours of daylight in summer.
Inner signals control other biological clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration(56) twice each year. Birds(57) flying become restless when it is time for the trip,(58) they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(59) of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(60) to control the timing of some of our actions. These(61) tell a person when to(62), when to sleep and when to seek food. Scientists say there probably are other biological clock cells that control other body activities.
Dr. Moorhead is studying(63) our biological clocks affect the way we do our work. For example, most of us have great difficulty if we must often change to different work hours.
(64) can take many days for a human body to accept the major change in work hours. Dr. Moorhead said industrial officials should have a better understanding of biological clocks and how they affect workers. He said(65) understanding could cut sickness and accidents at work and would help increase a factory's production.
A．scientists
B．humans
C．plants
D．animals
第5题
Biologists have known for some time that giraffes solve this problem by having 【C3】______ high blood pressure, about 【C4】______ that of human beings. But an international team of biologists began to 【C5】______ about this. If giraffes have such high blood pressure, they should have a 【C6】______ problem with swelling in their legs and feet. Why don't giraffes have swollen feet？
Giraffes should have 【C7】______ problem, too. Every time they bend heads 【C8】______ to drink, the blood should 【C9】______ to their heads and have a hard time 【C10】______ back up (when the head is down) to the heart. How come giraffes don't black out when they drink？
The answer to the 【C11】______ feet problem, the researchers found, is that giraffes have 【C12】______ the researchers call a "natural anti-gravity suit". It 【C13】______ out that the skin and other 【C14】______ in their legs and feet are 【C15】______ stiffer and tougher than those of other 【C16】______ . As a result, the blood vessels in the leg cannot swell.
Therefore, the blood has nowhere to go but back to the heart. What about blood rushing to the head 【C17】______ the giraffe bends down to drink？ The researchers found that the giraffe's jugular vein, which 【C18】______ blood from the head back to the heart, has lots of one-way valves in it. In the giraffe's neck, there are lots of muscles that flex and relax repeatedly as the animal moves its head and sucks 【C19】______ drinking water. By squeezing the valved jugular vein, they 【C20】______ blood moving back to the heart even while the animal is drinking.
【C1】
A．bring
B．produce
C．transfer
D．pump
第6题
A Biological Clock
Every living thing has what scientists call a biological clock that controls behavior. The biological clock(1)plants when to form. flowers and when the flowers should open. It tells insects when to(2)the protective cocoon (防护卵袋) and fly away, and it tells animals and human beings when to eat, sleep and wake.
Events outside the plant and animals(3)the action of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur because of the(4)of hours of daylight. In the short(5)of winter, its fur becomes white. The fur becomes gray brown in(6)in the longer hours of daylight in summer.
Inner signals control other(7)clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration(8)twice each year, Birds(9)from flying become restless when it is time for the trip,(10)they become calm again when the time of the flight has ended.
Scientists say they are beginning to learn which(11)of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain(12)to control the timing of some of our actions. These(13)tell a person when to wake, when to(14), and when to seek food. Scientists say there probably are other biological clock cells that(15)other body activities.
A．says
B．asks
C．talks
D．tells
第7题
Animal Intelligence
Are Animals intelligent？ If they are, which animals are the most intelligent？ These are not easy questions to answer. In the first place, no one is quite sure what intelligence is.
We often say that intelligence means being able to solve problems.(46). For example, dogs and cats often find their way home from long distances. To do this they have to use their intelligence. They have to remember and think. But many birds find their way over long distances, too. They travel thousands of miles every year when they move from cool to warmer places. We do not know how they do this but we know that they do not use their intelligence.
(47). Young birds are able to make these journeys without help as soon as they can fly. They are born with this ability. This is not intelligence. We call this 'instinct'.
Often we cannot be sure whether an animal is acting intelligently or instinctively. When a dog hears a strange noise, it barks. This is instinct. It cannot stop itself from doing this. It does not really know why it is doing this. But supposing a house is on fire and the dog barks outside its master's bedroom until he wakes up, is the dog using its intelligence？(48). Often we cannot be sure.
Many animals, however, can be taught to sole problems, especially when they are given rewards. Rats have been taught to press a lever to get food. Pigeons have been taught to peck a disc for the same reason. Even an octopus (章鱼) has been trained to know the difference between a square and an oblong (长方形) ! Animals in circuses have been taught to do all sorts of tricks to amuse an audience.(49). It is saying, " if I do this, I will get a reward. Therefore I will do it." This may be thought of as a low kind of intelligence.
Some animals, however, show a much higher kind of intelligence. They solve problems without any help. Chimpanzees, one of the ape family, are much more intelligent than other animals. A chimpanzee once did something even more intelligent. He did not have a stick. He had two short tubes. Neither of the tubes was long enough to reach the banana but one was wider than the other. He jammed the narrow tube inside the wider tube and in this way made one tube long enough to reach the banana(50).
A Is it solving the problem by waking its master or is it simply barking instinctively because it is afraid？
B Chimpanzees can solve certain problems without any help.
C Some animals seem able to do this.
D In all these cases we may say that an animal is using intelligence.
E In other words, he did not simply use a tool, which itself is intelligent: he made a tool.
F They do not remember places and directions and then make decisions.
第8题
From: Bruce Sanders (bruce@cityanimalshelter.org)
To: Sally Rutherford (sally@cityanimalshelter.org)
Subject: Advertisement
Date: June 9,10:28 a.m.
Sally,
I just got a phone call from the Tanaka Animal Clinic, and they are willing to donate $5,000 for the fundraiser. I am also expecting a call from Lou Gibbons, who said his company would donate for the shelter as well.
Before you finish the changes to the advertisement, please put the following:
"The City Animal Shelter would like to thank the Tanaka Animal Clinic and Gibbon's Photography for the generous donation to the fundraiser."
I already mentioned that we would include their names in our advertisement in hopes it would inspire other local businesses to donate. I think this fundraiser will be a great event.
Thank you for your hard work. Please show me the ad before you send it to the newspaper.
Regards,
Bruce
Where does Ms. Rutherford work？
A．At a newspaper
B．At an animal clinic
C．At an animal shelter
D．At a photography studio
第9题
Clone Farm
Factory farming could soon enter a new era of mass production. Companies in the US are developing the technology needed to "clone" chickens on a massive scale. Once a chicken with desirable traits has been bred or genetically engineered, tens of thousands of eggs, which will hatch into identical copies, could roll off the production lines every hour. Billions of clones could be produced each year to supply chicken farms with birds that all grow at the same rate, have the same amount of meat and taste the same.
This, at least, is the vision of the US's National Institute of Science and Technology, which has given Origen Therapeutics of Burlingame, California, and Embrex of North Carolina $ 4.7 million to help fund research. The prospect has alarmed animal welfare groups, who fear it could increase the suffering of farm birds.
That's unlikely to put off the poultry industry, however, which wants disease resistant birds that grow faster on less food. "Producers would like the same meat quantity but to use reduced inputs to get there. " says Mike Fitzgerald of Origen. To meet this demand, Origen aims to "create an animal that is effectively a clone", he says. Normal cloning doesn't work in birds because eggs can't be removed and implanted. Instead, the company is trying to bulk-grow embryonic stem cells taken from fertilized eggs as soon as they're laid. "The trick is to culture the cells without them starting to distinguish, so they remain pluripotent. " says Fitzgerald.
Using a long-established technique, these donor cells will then be injected into the embryo of a freshly laid, fertilized recipient egg, forming a chick that is a "chimera". Strictly speaking, a chimera isn't a clone, because it contains cells from both donor and recipient. But Fitzgerald says it will be enough if, 95 percent of a chicken's body develops from donor cells. "In the poultry world, it doesn't matter if it's not 100 percent. " he says.
Another challenge for Origen is to scale up production. To do this, it has teamed up with Embrex, which produces machines that can inject vaccines into up to 50,000 eggs an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it.
In future, Origen imagines freezing stem cells from different strains of chicken. If orders come in for a particular strain, millions of eggs could be produced in months or even weeks. At present, maintaining all the varieties the market might call for is too expensive for breeders, and it takes years to bread enough chickens to produce the billions of eggs that farmers need.
Which statement is the best description of the new era of factory farming according to the first paragraph？
A．Eggs are all genetically engineered
B．Thousands of eggs are produced every hour.
C．Cloned chickens are bulk-produced with the same growth rate, weight and taste.
D．Identical eggs can be hatched on the production lines.
第10题
A Biological Clock
Every living thing has whatscientists call a biological clock that controls behavior. The biological clock tells__ (51) when to form. flowers and when the flowers should open. It tells____(52) when to leave the protective cocoons and fly away, and it tells animalsand human beings when to eat, sleep and wake.
Events outside the plant andanimal_________(53) the actions of some biological clocks. Scientists recentlyfound, for example, that a tiny animal changes the color of its fur _ (54) the number of hours of daylight. In theshort _(55) of winter, its furbecomes white. The fur becomes gray brown in color in the longer hours ofdaylight in summer.
Inner signals control otherbiological clocks. German scientists found that some kind of internal clockseems to order birds to begin their long migration _(56) twice each year. Birds (57) flying become restlesswhen it is time for the trip, _ (58) they become calm again when the time ofthe flight has ended.
Scientists say they arebeginning to learn which _(59)of the brain contain biological clocks. An American researcher, MartinMoorhead, said a small group of cells near the front of the brain _(60) tocontrol the timing of some of our actions. These _______(61) tell a person whento _ (62) , when to sleep andwhen to seek food. Scientists say there probably are other bio-logical clockcells that control other body activities.
Dr. Moorhead is studying _(63) our biological clocks affect theway we do our work. For example, most of us have great-difficulty if we mustoften change to different work hours.
_(64) can take many days for a human bodyto accept the major change in work hours. Dr. Moorhead said industrialofficials should have a better understanding of biological clocks and how theyaffect workers. He said __ (65)understanding could cut sickness and accidents at work andwould help increase afactory's production.
A.scientists
B.humans
C.plants
D.animals
第11题
Which of the following is NOT a cause of increasing decline of wild animal population？
A．Exploitation
B．Pollution
C．Habitat alteration
D．Congressional law
