Spacing in Animals1
Flight Distance2
Any observant person has noticed that a wild animal will allow a man or other potential enemy to approach only up to a given distance before it flees. “Flight distance” is the terms used for this interspecies spacing. As a general rule, there is a positive relationship between the size of an animal and its flight distance3—the larger the animal, the greater the distance it must keep between itself and the enemy. An antelope4 will flee when the enemy is as much as five hundred yards away. The wall lizard’s5 flight distance, on the other hand is about six feet. Flight is the basic means of survival for mobile creatures.
Critical Distance
Critical distance apparently is present wherever and whenever there is a flight reaction. “Critical distance” includes the narrow zone separating flight distance from attack distance. 6 A lion in a zoo will flee from an approaching man until it meets a barrier that it cannot overcome. If the man continues the approach, he soon penetrates the lion"s critical distance, at which point the cornered lion reverses direction7 and begins slowly to stalk the man.
Social Distance
Social animals need to stay in touch with each other. Loss of contact with the group can be fatal for a variety of reasons including exposure to enemies. Social distance is not simply the distance at which an animal will lose contact with his group—that is, the distance at which it can no longer see, hear, or smell the group—it is rather a psychological distance, one at which the animal apparently begins to feel anxious when he exceeds its limits. We can think of it as a hidden band that contains the group8.
Social distance varies from species to species. It is quite short—apparently only a few yards—among some animals, and quite long among others.
Social distance is not always rigidly fixed but is determined in part by the situation. When the young of apes and humans are mobile but not yet under control of the mother"s voice, social distance may be the length of her reach9. This is readily observed among the baboons in a zoo. When the baby approaches a certain point, the mother reaches out to seize the end of its tail and pull it back to her. When added control is needed because of danger, social distance shrinks. To show this in man, one has only to watch a family with a number of small children holding hands as they cross a busy street.
词汇:
observant/ əbˈzɜ:vənt/adj. 观察力敏锐的
barrier / "bærɪə(r)/n.障碍物
potential/ pəˈtenʃəl/adj. 潜在的
contact/ "kɒntækt/n. 联系;接触
survival / səˈvaɪvəl/n.逃生,幸免
fatal / "feɪtl/adj.致命的
mobile / "məʊbaɪl/adj.可动的,活动的
rigidly/ "rɪdʒɪdlɪ/adv. 刻板地,死板地
approach / ə"prəʊtʃ/v.朝……走近
baboon / bəˈbu:n/n.狒狒
注释:
Which of the following could best replace the word “band” in “We can think of it as a hidden band that contains the group” (in Paragraph 3)?
A:Strip of land B:Distance C:Society D:Community
Spacing in Animals 1 Flight Distance
Any observant person has noticed that a wild animal will allow a man or other potential enemy to approach only up to a given distance before it flees. “Flight distance 2” is the terms used for this interspecies spacing. As a general rule, there is a positive relationship between the size of an animal and its flight distance 3—the larger the animal, the greater the distance it must keep between itself and the enemy. An antelope 4 will flee when the enemy is as much as five hundred yards away. The wall lizard 5’s flight distance, on the other hand is about six feet. Flight is the basic means of survival for mobile creatures.
Critical Distance
Critical distance apparently is present wherever and whenever there is a flight reaction. “Critical distance” includes the narrow zone separating flight distance from attack distance 6. A lion in a zoo will flee from an approaching man until it meets a barrier that it cannot overcome. If the man continues the approach, he soon penetrates the lion"s critical distance, at which point the cornered lion reverses direction 7 and begins slowly to stalk the man.
Social Distance
Social animals need to stay in touch with each other. Loss of contact with the group can be fatal for a variety of reasons including exposure to enemies. Social distance is not simply the distance at which an animal will lose contact with his group—that is, the distance at which it can no longer see, hear, or smell the group—it is rather a psychological distance, one at which the animal apparently begins to feel anxious when he exceeds its limits. We can think of it as a hidden band that contains the group 8.
Social distance varies from species to species. It is quite short—apparently only a few yards—among some animals, and quite long among others.
Social distance is not always rigidly fixed but is determined in part by the situation. When the young of apes and humans are mobile but not yet under control of the mother"s voice, social distance may be the length of her reach 9. This is readily observed among the baboons in a zoo. When the baby approaches a certain point, the mother reaches out to seize the end of its tail and pull it back to her. When added control is needed because of danger, social distance shrinks. To show this in man, one has only to watch a family with a number of small children holding hands as they cross a busy street.
词汇:
observant[əbˈzɜ:vənt] adj.观察力敏锐的;
barrier["bærɪə(r)] n.障碍物
potential[pəˈtenʃl] adj.潜在的
contact["kɒntækt] n.接触;联系
survival[səˈvaɪvl] n.逃生,幸免;
fatal["feɪtl] adj.致命的
mobile["məʊbaɪl] adj.可动的,活动的;
rigidly["rɪdʒɪdlɪ] adv.刻板的;死板的
approach[ə"prəʊtʃ] v朝……走近
baboon[bəˈbu:n] n.狒狒;
注释:
1.spacing in animals :动物的间隔距离
2.flight distance:逃离距离
3..,.there is a positive relationship between the size of an animal and its flight distance.……动物体积与其逃离距离之间成正比关系。
4.antelope:羚羊
5.wall lizard:壁虎
6.“Critical distance" includes the narrow zone separating flight distance from attack distance.关键距离指逃离距离和进攻距离之间的狭窄区域。
7.reverse direction:调转方向。
8.a hidden band that contains the group:-条控制群体的隐形带
9.the length of her reach:她手臂够得着的长度
Which of the following could best replace the word “band” in “We can think of it as a hidden band that contains the group” (in Paragraph 3)?
A:Strip of land B:Distance C:Society D:Community
潜在缺乏 hidden hunger
有这样一个表单元素,想要找到这个hidden元素,下面哪个是正确的()
A:visible B:hidden C:visible D:hidden
Henry’s job was to examine cars which crossed the frontier to make sure that they were not smuggling any thing into the country. Every evening except at weekends, he (36) see a factory worker coming up the hill towards the frontier, (37) a bicycle with a big load of straw on it. When the bicycle (38) the frontier, Henry used to stop the man and (39) him take the straw off and (40) it. Then he would examine the straw very carefully to see (41) he could find anything, after which he would look in all the man’s pockets (42) he let him tie the straw again. The man would then put it on his bicycle and go off down the hill with it. Although Henry was always (43) to find gold or jewellery or other valuable things (44) in the straw, he never found (45) , even though he examined it very carefully. He was sure that the man was (46) something, but he was not (47) to imagine what it could be.
Then one evening, after he has looked (48) the straw and emptied the factory worker’s ,pockets (49) usual, he (50) to him, "Listen. I know that you are smuggling things (51) this frontier. Won’t you tell me what it is that you are bring into. Today’s my last day on the (52) . Tomorrow I’m going to (53) . I promise that I shall not tell (54) if you tell me what you’ve been smuggling." The factory worker did not say anything for (55) . Then he smiled, turned to Henry and said quickly: "Bicycles."
A:had been hidden B:hiding C:have been hidden D:hidden
Henry’s job was to examine cars which crossed the frontier to make sure that they were not smuggling any thing into the country. Every evening except at weekends, he (36) see a factory worker coming up the hill towards the frontier, (37) a bicycle with a big load of straw on it. When the bicycle (38) the frontier, Henry used to stop the man and (39) him take the straw off and (40) it. Then he would examine the straw very carefully to see (41) he could find anything, after which he would look in all the man’s pockets (42) he let him tie the straw again. The man would then put it on his bicycle and go off down the hill with it. Although Henry was always (43) to find gold or jewellery or other valuable things (44) in the straw, he never found (45) , even though he examined it very carefully. He was sure that the man was (46) something, but he was not (47) to imagine what it could be.
Then one evening, after he has looked (48) the straw and emptied the factory worker’s ,pockets (49) usual, he (50) to him, "Listen. I know that you are smuggling things (51) this frontier. Won’t you tell me what it is that you are bring into. Today’s my last day on the (52) . Tomorrow I’m going to (53) . I promise that I shall not tell (54) if you tell me what you’ve been smuggling." The factory worker did not say anything for (55) . Then he smiled, turned to Henry and said quickly: "Bicycles."
A:had been hidden B:hiding C:have been hidden D:hidden
{{B}}第三篇{{/B}}
? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ?{{B}}The Effects of Global Warming on Weather{{/B}} ? ?There are hidden factors which scientists call “feedback mechanisms”. No one knows quite how they will interact with the changing climate. Here’s one example: plants and animals adapt to climate change over centuries. At the current estimate of half a degree centigrade of warming per decade, vegetation (植物) may not keep up. Climatologist James Hansen predicts climate zones will shift toward the poles by 50 to 75 kilometres a year—faster than trees can naturally migrate. Species that find themselves in an unfamiliar environment will die. The 1000-kilometer-wide strip of forest running through Canada, the USSR and Scandinavia could be cut by half. Millions of dying trees would soon lead to massive forest fires, releasing tons of CO2 and further boosting global warming. ? ?There are dozens of other possible “feedback mechanism”. Higher temperatures will fuel condensation and increase cloudiness, which may actually damp down global warming. Others, like the “albedo” effect, will do the opposite. The “albedo” effect is the amount of solar energy reflected by the earth’s surface. As northern ice and snow melts and the darker sea and land pokes (戳) through, more heat will be absorbed, adding to the global temperature increase. ? ?Even if we were to magically stop all greenhouse-gas emissions tomorrow the impact on global climate would continue for decades. Delay will simply make the problem worse. The fact is that some of us are doing quite well the way things are. In developed world prosperity has been built on 150 years of cheap fossil fuels. ? ?Material progress has been linked to energy consumption. Today 75 percent of all the world’s energy is consumed by a quarter of the world’s population. The average rich-world resident adds about 3.2 tons of CO2 yearly to the atmosphere, more than four times the level added by each Third World citizen. The US, with just seven per cent of the global population, is responsible for 22 per cent of global warming. |
A:how plants and animals adapt to hidden factors B:how plants and animals interact with the changing climate C:how climate changes D:how climate zones shift
?
?下面有3篇短文,每篇短文后有5道题,每题后面有4个选项。请仔细阅读短文,并根据短文回答其后面的问题,从4个选项中选择1个最佳答案。
{{B}}第一篇{{/B}}
A:elements representing the numbers three and four B:highly stylized buildings and trees C:a moral lesson hidden behind the literal figures D:figures with halos and bare feet