题目
题型：不详难度：来源：
Some birds like eating locusts (蝗虫), but birds cannot easily catch them. Why? It is because locusts change their colors together with the change of the colors of crops(庄稼). When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees.
Have you ever noticed an even stranger act? A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. So it has lived up to now though it is not strong at all.
小题1:From the passage we learn that locusts________.
| A．are small animals | B．are easily found by birds |
| C．are dangerous to their enemies | D．change their colors to protect themselves |
| A．They run away quickly. | B．They have the colors much like their enemies. |
| C．They hide themselves by day and appear at night. | D．They have to move quietly. |
| A．they have the colors much like the trees | B．they move quietly |
| C．they like brown and gray colors | D．they live in forests |
| A．Because it is very and strong. |
| B．Because the liquid it sends out can help it escape from its enemies. |
| C．Because the liquid it sends out can kill its enemies. |
| D．Because it swims faster than any other fish. |
| A．The Change of Colors for Animals and Pests | B．Colors of Different Animals and Pests |
| C．The Main Use of Colors for Animals and Pests | D．Some Animals and Pests |
答案
小题1:D
小题1:C
小题1:A
小题1:B
小题1:C
解析
小题1:根据It is because locusts change their colors together with the change of the colors of crops(庄稼).描述，可知选D。
小题1:根据Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.描述，可知选C。
小题1:根据Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters (猎人). This is because they have the colors much like the trees.描述，可知选A。
小题1:根据A kind of fish in the sea can send out a kind of very black liquid (液体)when it faces danger. While the liquid spreads over (散开), its enemies (敌人)cannot find it. And it immediately swims away. 描述，可知选B。
小题1:通过阅读短文，可知本文主要介绍了动物和昆虫是如何通过颜色来保护自己的，故选C，颜色对于动物和昆虫的主要用途。
核心考点
试题【Do you know why different animals or pests (昆虫) have their special colors? Color】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
In the study, the robot, called AIBO, is placed for six weeks in the houses of some old people who live alone. Before placing AIBO in the home, scientists will collect baseline data(数据) for six weeks. These old people will keep a diary to note their feelings and activity before and after AIBO. Then, the scientists will review the data to test if it has produced any changes in the life of its owner.
“I talk to him all the time, and he responds to my voice,” says a seventy-year-old lady. “When I’m watching TV, he’ll stay in my arms until he wants down. He has his own mind.”
The AIBOs respond to certain orders. The scientists say they have some advantages over live dogs, especially for old people. Often the elderly are disabled and cannot care for an animal by walking it or playing with it. A robotic dog removes exercise and feeding concerns.
“At the beginning, it was believed that no one would relate(与……相关) to the robotic dog, because it was metal and not furry.” Beck says. “Hopefully, down the road, these robotic pets could become a more-valuable health helper. They will record their masters’ blood pressure, oxygen levels or heart rhythms(心律). AIBOs may even one day have games that can help stimulate(刺激) older people’s minds.”
小题1:The purpose of Beck and Edwards’ study is to _____________.
| A．understand human-animal relationship |
| B．make lonely old people’s life better |
| C．find the causes of old people’s loneliness |
| D．improve the animal-assisted research |
| A．note the activities of AIBOs |
| B．keep AIBOs at home for 12 weeks |
| C．record their feelings and activity |
| D．study the collected information |
| A．moves again | B．is movable | C．doesn’t need | D．need |
| A．It is easier to keep at home. |
| B．It can help the disabled people. |
| C．It responds to all the human orders. |
| D．It can watch TV with its owner. |
| A．cure certain diseases | B．keep old people active |
| C．change people’s ideas | D．look more like real dogs |
Our nearest neighbor is the moon. In the sky, the moon and the sun seem to be of the same size because the moon is much nearer.
The moon makes the tides—the changes in the level of the sea. The moon and the sun together pull the sea. In some parts of the world, the difference between * high tide’ (when the sea is very near to the land) and ’ low tide’ (when the sea is far away from the land) is very big. This is very important for ships.
The moon is very different from the Earth. Gravity on the moon is six times weaker than that on the Earth. There isn’t any air. During the day, it is very, very hot but at night it is very, very cold. Nothing can live on the moon.
If the moon goes between the Earth and the sun, we have an eclipse of the sun(日食) . The moon stops the light from the sun and we have night in the day.
If the Earth goes between the moon and the sun, we have an eclipse of the moon. The moon goes into the shadow( 影子) of the Earth and it disappears for a few minutes.
小题1:When the moon goes between the Earth and the sun, we have night in the day, we call it the eclipse of
| A．the moon | B．the sun | C．the stars | D．the Earth |
| A．The Earth goes between the moon and the sun. |
| B．The moon goes into the shadow of the sun. |
| C．The moon goes into the shadow of its own. |
| D．The sun disappears for a few minutes. |
a. The moon and the sun are of the same size.
b. Gravity on the Earth is 6 times stronger than that on the moon.
c. The changes in the level of the sea are called tides.
d. The moon itself pulls the sea and makes the tides.
e. When the sea is near to the land, a high tide may happen.
f. It is much hotter in the day but much colder at night on the moon.
| A．a. b. c. f. | B．b. c. d. e | C．a. d. e. f | D．b. c. e. f |
People often say they feel good when the sun is shining and sad when it is cloudy. In fact, sunlight makes us feel good. When sunlight hits our skins, our bodies produce a vitamin. Vitamins are natural chemicals (化学物质) which we all need to stay healthy. Sunlight helps our bodies produce vitamin D. Vitamin D helps our bodies make a special chemical. This special chemical affects our brains (大脑) and makes us feel happy. For example, there are long, dark winters of little sunlight in Sweden and Norway, so many people in these countries often feel sad. Without much sunlight, their bodies produce less vitamin D. Without enough vitamin D, their bodies make less of this special chemical which makes them feel good. To help the people in these countries feel better, special “sunrooms” with artificial (人造的) lights have been built. People can go there and get “sunlight” for an hour or two!
The weather can also affect people’s emotions in other ways. Hot weather can make people angry because people feel uncomfortable when they are hot. In the same way, rain can make people angry because being wet can be unpleasant. As you can see, the weather can have an effect on the chemicals which control our brains. Through these ways, the weather can influence our emotions. Sadly, while the weather can change us, we can hardly change the weather.
小题1: Which of the following is NOT mentioned as a factor (因素) that can affect one’s emotions?
| A．Weather. | B．Actions of others. |
| C．Personality. | D．Age. |
| A．It is a kind of artificial chemical. |
| B．It makes us worried by affecting our brains. |
| C．It is needed by us all to keep fit. |
| D．It is in the sunlight. |
| A．We feel good when we are in the bright cool weather. |
| B．We will be happy when we are caught in the rain. |
| C．All people in Norway and Sweden feel sad in winter. |
| D．The more vitamin D you have, the happier you’ll be. |
| A．Why Do We Feel Sad? |
| B．The Weather Influences People’s Emotions |
| C．People Need More Vitamin D |
| D．We Can Hardly Change the Weather |
Researchers from Cornell University think that it is because spice plants have some important chemicals(化学物质)．These chemicals can kill bacteria(细菌)which spoil food．
“Most common spices can kill 75 to 100 percent of the bacteria in food，”explains one of the scientists．The bacteria grow more easily and spoil food more quickly at higher temperatures．For this reason，it is more difficult to keep food from spoiling in hot climates，
Do you like your food spicy? Your answer probably tells something about the country you come from．If you like spicy food，it is possible that hundreds of years ago，when there were no fridges，people in your country started using spices to keep the food from spoiling．The traditional spicy dishes helped those people to live longer，healthier lives．Today，in a time of fridges，the spices just make the food taste good．
小题1:The chemicals in spices keep food from spoiling by_________．
| A．making food taste better |
| B．making food hotter |
| C．killing bacteria in food |
| D．preventing bacteria getting into food |
| A．high temperature makes more bacteria |
| B．high temperature helps bacteria grow faster |
| C．bacteria get used to hot food |
| D．bacteria spoil food only at high temperature |
| A．replacing fridges |
| B．helping you to live longer |
| C．helping to keep you healthier |
| D．making your food taste better |
Earthquake Intensity & Observed Effects（强度与现象）
I. Felt by only a few people under very special conditions.
II. Felt by only a few people at rest, especially on the upper floors of buildings.
III. Felt noticeably indoors, especially on upper floors of buildings.
IV. Felt indoors by many people, outdoors by a few; some awaked.
V. Felt by nearly everyone; many awaked; dishes and windows break; plaster (灰泥) cracks (开裂).
VI. Felt by everyone; many frightened and run outdoors; heavy furniture such as tables and shelves moves.
VII. Everyone runs outdoors; small to moderate (中等的) damage(损毁) in usual buildings.
VIII. Considerable (相当大的) damage in usual buildings; monuments(碑) fall.
IX. Considerable damage in all buildings; ground cracks; underground pipes (管道) break.
X. Most buildings damaged; rails bend(弯曲); landslides (山崩) take place; water splashes(溅落) over banks.
XI. Few buildings left standing; bridges damaged; wide cracks in the ground; underground pipes break.
XII. Damage total; waves seen on ground; objects thrown into air.
小题1:According to the picture, what is the possible position of the earthquake’s epicenter?
| A．36°N, 90°W. | B．36°N, 90°E. | C．90°N, 36°W. | D．90°N, 36°E. |
| A．Everyone runs outdoors. |
| B．Only a few people feel it. |
| C．Many people who stay indoors feel it. |
| D．Felt by people on the upper floors of buildings. |
| A．Cincinnati. | B．Louisville. | C．Pittsburgh. | D．Nashville. |
| A．Felt indoors by few people under very special conditions. |
| B．Few buildings left standing. |
| C．Felt noticeably indoors, especially on upper floors of buildings. |
| D．Felt indoors by many people, outdoors by a few, some awaked. |
| A．Nashville. | B．Louisville. | C．Syracuse. | D．Cincinnati. |
最新试题
- 1两个反比例函数y=3x，y=6x在第一象限内的图象如图所示，点P1，P2，P3，…，P2011：在反比例函数y=6x图象
- 2在电场线如图所示的电场中有M、N两点，一个带电离子（不计重力）仅在电场力作用下由静止开始从M点运动到N点，则（ ）A．
- 3关于物体的内能和温度，下列说法中正确的是（ ）A．一般说来，对同一物体，温度越高，物体内分子热运动越激烈，内能也就越大
- 4材料一：2011年1月4日国务院正式批复了《山东半岛蓝色经济区发展规划》。2月18日山东半岛蓝色经济区建设正式启动。根据
- 5在直角坐标系中，曲线的参数方程为（为参数），若以直角坐标系的原点为极点，轴的正半轴为极轴建立极坐标，曲线的极坐标方程为（
- 6以下划线部分有利于减小压强的是[ ]A.B.C.D.
- 7将铁粉和铜粉混合物7.0g，加入到盛有60.0g稀盐酸的烧杯中，恰好完全反应．此时烧杯内各物质的总质量为66.8g．试计
- 8下列作法中属于增大摩擦的是[ ]A.锁生锈不好开时，可将少量食油注入锁孔就易打开 B.拉链不好拉时，可在拉链上抹
- 9下列变化属于物理变化的是A．蛋白质盐析B．煤干馏C．淀粉在人体内消化D．石油裂解
- 10解方程：3x-12-5x-65=0.2．
热门考点
- 1计算： （1）26﹣17+（﹣5）﹣33；（2）；（3）；（4）。
- 2如果让你对华佗作简短介绍，你可能会用到下列那些史料①最早采用望、闻、问、切四种诊断方法②生活在西汉时期的著名医学家③制成
- 3满足下列哪种条件时，能判定△ABC与△DEF全等的是[ ]A．∠A=∠E，AB=EF，∠B=∠DB．AB=DE，
- 4基础写作 众所周知，随着因特网的普及，一些青少年染上网瘾不能自拔，有的甚至因受网络不良信息的毒害而走上了犯罪道路
- 5读“发达国家和发展中国家城市人口比较变化曲线图”，回答问题。（6分）(1)A、B两条曲线中代表发达国家城市化进程的是__
- 6任务型阅读：根据短文内容，回答下列问题。 There are many famous museums thr
- 7已知4＞3，则下列结论：（1）4a＞3a；（2）4+a＞3+a；（3）4-a＞3-a．正确的是（ ）A．（1），（2）
- 8成年人的血量大约为体重的10%左右。[ ]
- 9设正数a,b满足, 则（ ）A．0B．C．D．1
- 10圆C经过点A（2，﹣1），和直线x+y=1相切，且圆心在直线y=2x上．（1）求圆C的方程；（2）圆内有一点B（2，﹣）