题目
题型：不详难度：来源：
Some plants have their own ways to keep animals away. For example, the leaves of the holly plant have sharp spines (刺) that discourage grass-eating animals. Holly leaves on lower branches have more spines than leaves on upper branches. This is because the lower leaves are easier for most animals to reach.
Some plants, such as the oak tree, have thick and hard leaves that are difficult for animals to eat. Some grasses may contain a sandy material; eating such grasses wears down the animal"s teeth.
Many plants also have chemical defenses. Some plants produce chemicals that taste bitter or cause an unpleasant reaction. Some plants may fight against an attack by increasing the production of these chemicals. When a caterpillar (毛虫) bites a tobacco leaf, the leaf produces a chemical messenger. This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
Many plants depend on both physical and chemical defenses. A certain plant in China, for
instance, has prickly (多刺的) leaves, and each prickle contains poisonous venom (毒液) A single experience with this kind of plant will teach an animal to stay away from it in the future.
小题1:The holly plant has more spines on the lower leaves because most animals________.
| A．are not tall enough | B．like the lower leaves only |
| C．are not clever enough | D．can get the lower leaves easily |
| A．chemical means | B．physical means |
| C．bitter chemicals | D．sandy materials |
| A．Its leaves fight against the attack by physical means. |
| B．Its roots send a messenger to discourage the caterpillar. |
| C．Its roots increase the production of nicotine when it is attacked. |
| D．Its leaves produce poisonous sand to drive the caterpillar away. |
| A．Plants and Animals | B．How Plants Defend Themselves |
| C．Attacks and Defenses | D．How Animals Eat Plant Leaves |
答案
小题1:D
小题2:B
小题3:C
小题4:B
解析
小题1:考查考生对因果关系的认定能力。文章第二段This is because the lower leaves are easier for most animals to reach.提供答案。
小题2:考查考生对短文中细节的识辨能力。答案在文章第三段。
小题3:考查考生对短文中细节的识辨能力。答案在文章第四段This messenger sends to the roots the information to produce more nicotine. The higher levels of nicotine discourage the caterpillar.
小题4:考查考生拟定标题的能力。文章第一段总领全文，介绍了植物是如何进行自我保护的。
核心考点
试题【Animals can move from place to place, but plants cannot. When an animal is under】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
In the upper part of the tunnel two air-conditioning pipes remove the waste gas of trucks and cars and keep the quality of air inside the tunnel. The lighting is at the top of the tunnel, practically at its highest point. There will also be electric signs at frequent intervals. They show traffic conditions ahead and can be seen clearly by drivers. The wall is made up of four main elements, which include a waterproofing covering and, on the inside of the tunnel, a concrete lining.
Each tunnel is roughly round and the lower part of the tunnel is somewhat flat. The surface of the road lies on the base, which is made of concrete and steel. The drainage system, just below the road surface on one side, removes any extra liquid, particularly water. In the event of fire, the fire main, which is made of steel, pipes water to many fire hydrant stations at regular intervals along the length of the tunnel. The fire main is at the side of the tunnel and at the level of the road surface. Other systems in the tunnel will include emergency phones.
小题1:Each of the tunnels under construction is _____.
| A．eight kilometers long and twenty meters wide |
| B．eight kilometers long and six meters wide |
| C．four kilometers long and twenty meters wide |
| D．four kilometers long and six meters wide |
A. 1 B. 3 C. 5 D 6
小题3:Driving in the tunnel, one can know the traffic conditions ahead through______.
| A．the lights | B．the electric signs |
| C．the trucks and the cars | D． the emergency phones |
| A．the construction of a road | B．the design of a road |
| C．the construction of two tunnels | D．the design of two tunnels |
changes for the worse; changes that brought a lot of benefits to human beings, changes that put man in danger. Many things caused the changes, but, in my opinion, the most important was the progress in science.
Scientific research in physics and biology has vastly broadened our views. It has given us a deeper knowledge of the structure of matter and of the universe; it has brought us a better understanding of the nature of life and of its continuous development. Technology m the application of science m has made big advances that have benefited us in nearly every part of life.
The continuation of such activities in the twenty-first century will result in even greater advantages to human beings: in pure science -- a wider and deeper knowledge in all fields of learning; in applied science -- a more reasonable sharing of material benefits, and better protection of the environment.
Sadly, however, there is another side to the picture. The creativity of science has been employed in doing damage to mankind. The application of science and technology to the development and production of weapons of mass destruction has created a real danger to the continued existence of the human race on this planet. We have seen this happen in the case of nuclear weapons, Although their actual use has so far occurred only in the Second World War, the number of nuclear weapons that were produced and made ready for use was so large that if the weapons had actually been used, the result could have been the ruin of the human race, as well as of many kinds of animals.
William Shakespeare said, “The web of our life is of a mingled yarn (纱线), good and ill together.” The above brief review of the application of only one part of human activities----- science seems to prove what Shakespeare said. But does it have to be so? Must the ill always go together with the good? Are we biologically programmed for war?
小题1:Which of the following best shows the structure of the passage?
| A． | B． | C． | D． |
| A．a great many nuclear weapons were actually used for war |
| B．a large number of nuclear weapons should have been used for war |
| C．the author is doubtful about the ruin of human beings by nuclear weapons |
| D．the author is anxious about the huge number of nuclear weapons on the earth |
| A．simple | B．mixed | C．sad | D．happy |
| A．Further application of science to war. |
| B．More reading of William Shakespeare. |
| C．Proper use of science in the new century. |
| D．Effective ways to separate the good from the ill. |
The number of gunners, however, grows rapidly. Children too young to develop proper judgments through independent thought are led along way away by their gunning parents. They are subjected to advertisements of gun producers who describe shooting as good for their health and guncarrying as a way of putting redder blood in the veins (血管). They are persuaded by gunner magazines with stories honoring the chase and the kill. In school they view motion pictures which are supposedly meant to teach them how to deal with arms safely but which are actually designed to stimulate (刺激) a desire to own a gun. Wildlife is disappearing because of shooting and because of the loss of wildland habitat (栖息地). Habitat loss will continue with our increasing population, but can we slow the loss of wildlife caused by shooting? There doesn"t seem to be any chance if the serious condition of our birds is not improved.
Wildlife belongs to everyone and not to the gunners alone. Although most people do not shoot, they seem to forgive shooting for sport because they know little or nothing about it. The only answer, then, is to bring the truth about sport shooting to the great majority of people.
Now, it is time to realize that animals have the same right to life as we do and that there is nothing fair or right about a person with a gun shooting the harmless and beautiful creatures. The gunners like to describe what they do as character-building, but we know that to wound an animal and watch it go through the agony of dying can make nobody happy. If, as they would have you believe, gun-carrying and killing improve human-character, then perhaps we should encourage war.
小题1:According to the text, most people do not seem to be against hunting because___________.
| A．they have little knowledge of it | B．it helps to build human character |
| C．it is too costly to stop killing wildlife | D．they want to keep wildlife under control |
| A．form | B．Condition | C．pain | D．sadness |
| A．teach them how to deal with guns safely | B．praise hunting as character-building |
| C．describe hunting as an exercise | D．encourage them to have guns of their own |
| A．blame the majority of people | B．worry about the existence of wildlife |
| C．be in favour of war | D．be in support of character-building |
| ·Some scientists claim that we humans are the only living things that are conscious(有意识的)—we alone are aware that we are thinking. ·No one knows how consciousness works—it is one of science’s last great mysteries. ·All your thoughts take place in the cerebrum(大脑皮质),which is at the top of your brain,and different kinds of thought are linked to different areas,called association areas. ·Each half of the cerebrum has four rounded ends called lobes(脑叶)—two at the front(frontal and temporal lobes)and two at the back(occipital and parietal lobes). ·The frontal lobe is linked to your personality and it is where you have your bright ideas. ·The temporal lobe is where you hear and understand what people say to you. ·The occipital lobe is where you work out what your eyes see. ·The parietal lobe is where you record touch,heat and cold,and pain. ·The left half of the brain controls the right side of the body.The right half controls the left side. ·One half of the brain is always dominant(in charge).Usually,the left brain is dominant,which is why 90% of people are right-handed. |
| A．The frontal lobe. | B．The temporal lobe. |
| C．The occipital lobe. | D．The parietal lobe. |
| A．One’s personality has something to do with the frontal lobe. |
| B．Bright ideas come from the parietal lobe. |
| C．The occipital and temperal lobes are at the back of the cerebrum. |
| D．The occipital lobe is in charge of sound. |
| A．their frontal lobe is usually dominant |
| B．their temporal lobe is usually dominant |
| C．their right brain is usually dominant |
| D．their left brain is usually dominant |
Here is what Professor Wellman means.Before the invention of the Internet and e-mail,our social networks included live interactions with relatives,neighbors,and friends.Some of the interaction was by phone,but it was still voice to voice,person to person,in real time.
A recent research study by the Pew Internet and American Life Project showed that for a lot of people,electronic interaction through the computer has replaced this person-to-person interaction.However,a lot of people interviewed for the Pew study say that’s a good thing.Why?
In the past,many people were worried that the Internet isolated(孤立)us and caused us to spend too much time in the imaginary world of the computer.But the Pew study discovered that the opposite is true.The Internet connects us with more real people than expected—helpful people who can give advice on careers,medical problems,raising children,and choosing a school or college.About 60 million Americans told Pew that the Internet plays an important role in helping them make major life decisions.
Thanks to the computer,we are able to be alone and together with other people—at the same time!
小题1:The underlined phrase “networked individualism”probably means that by using computers people_______.
| A．stick to their own ways no matter what other people say |
| B．have the rights and freedom to do things of their own interest |
| C．do things in their own ways and express opinions different from other people |
| D．are able to keep to themselves but at the same time reach out to other people |
| A．Networks. | B．Friends. |
| C．Phones. | D．Parents. |
| A．people have been separated from each other by using computers |
| B．the Internet makes people waste a lot of time and feel very lonely |
| C．the Internet has become a tool for a new kind of social communication |
| D．a lot of people regard the person-toperson communication as good thing |
| A．We’re Alone on the Internet. |
| B．We’re Communicating on the Internet. |
| C．We’re Alone Together on the Internet. |
| D．We’re in the Imaginary World of the Internet. |
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