题目
题型：不详难度：来源：
The answer is that your way of life, wherever you live in the world, is tied to the tropics in many ways. If you live in a house, wash your hair, eat fruits and vegetables, drink soda, or drive a car, you can be certain that you are affected by the loss of tropical forests.
Biologically, we are losing the richest regions on earth when, each minute, a piece of tropical forest, the size of ten city blocks, disappears. As many as five million species of plants, animals, and insects (40 to 50 percent of all living things) live there, and are being lost faster than they can be found and described. Their loss is immeasurable.
Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not good enough. Today over half the world"s commercial rubber is produced in Malaysia and Indonesia, while the Amazon"s rubber industry produces much of the world"s four million tons. And rubber is an important material in making gloves, balloons, footwear and many sporting goods. Thousands of other tropical plants are valuable for their industrial use.
Many scientists strongly believe that deforestation contributes to the greenhouse effect -- or heating of the earth from increased carbon dioxide in the atmosphere. As we destroy forests, we lose their ability to change carbon dioxide into oxygen.
Carbon dioxide levels could double within the next half-century, warming the earth by as much as 4.5 degrees. The result? A partial melt-down of polar ice caps, raising sea levels as much as 24 feet; even 15 feet could threaten anyone living within 35 miles of the coast. Unbelievable? Maybe. But scientists warn that by the time we realise the severe effects of tropical deforestation, it will be 20 years too late.
Can tropical deforestation affect our everyday lives? Now, you should have got the answer.
小题1:The underlined word "synthetics" probably means_________.
| A．natural rubber | B．tropical materials |
| C．man-made material | D．commercial rubber |
| A．The forests are losing their function in turning carbon dioxide into oxygen. |
| B．Many of our daily uses are related to the tropical forests. |
| C．Tropical plants can be used to make industrial products. |
| D．High carbon dioxide levels will make the earth warmer. |
| A．puzzling | B．cold | C．supporting | D．opposed |
| A．Tropical Forests | B．The Value of Tropical Forests |
| C．Tropical Forests and Our Life | D．The Greenhouse Effects |
答案
小题1:C
小题2:A
小题3:D
小题4:C
解析
试题分析：本文主要讲述的是热带雨林对环境的诸多好处，同时也说明了热带雨林的失去对环境会带来很多的伤害。
小题1:C推理题。根据Take rubber for example. For many uses, only natural rubber from trees will do. Synthetics are not good enough.可知这里的. Synthetics应该是与前面的natural rubber是相反的意思，指非自然的人造材料。故C项正确。
小题2:A 推理题。文章中提及了失去了热带雨林，我们就会失去把二氧化碳转换成氧气的物体，而不是说森林失去把二氧化碳转换成氧气的的能力。故A想说法是错误的。其余三项在文章中都有涉及。
小题3:D 推理题。作者在文章中多次提及了失去热带雨林对我们的环境的巨大影响，说明他对破坏雨林是持反对态度的。故D正确。
小题4:C 主旨大意题。本文主要讲述的是热带雨林对环境的诸多好处，同时也说明了热带雨林的失去对环境会带来很多的伤害。故C正确。
核心考点
试题【One reaction to all the concern about tropical deforestation（毁林） is a blank star】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
Some scientists believe that birds do sing some of the time just because they are happy．However they sing most of the time for a very different reason．Their singing is actually a warning to other birds to stay out of their territory．
Do you know what a “territory” is? A territory is an area that an animal, usually the male, claims (声称) as its own．Only he and his family are welcome there． No other families of the same species are welcome．Your house is your territory where only your family and friends are welcome．If a stranger should enter your territory and threaten you, you might shout．Probably this would be enough to frighten him away．
If so, you have actually frightened the stranger away without having to fight him．A bird does the same thing．But he expects an outsider almost any time, especially at nesting (筑巢) season．So he is screaming all the time, whether he can see an outsider or not．This screaming is what we call a bird’s song, and it is usually enough to keep an outsider away．
小题1:Some scientists believe that most of the time bird’s singing is actually ______．
| A．an expression of happiness | B．a way of warning |
| C．an expression of anger | D．a way of greeting |
| A．A place where families of other species are not accepted. |
| B．A place where a bird may shout at the top of its voice． |
| C．An area for which birds fight against each other． |
| D．An area which a bird considers to be its own． |
| A．Because they want to invite more friends． |
| B．Because their singing helps frighten outsiders away． |
| C．Because they want to find outsiders around． |
| D．Because their singing helps get rid of their fears． |
| A．By comparing birds with human beings． |
| B．By reporting experiment results． |
| C．By describing birds’ daily life． |
| D．By telling a bird’s story． |
Food for space has to be packed in special ways．Some of it goes into tubes that a man can squeeze into his mouth．Bite-sized cookies are packed in plastic．
There is a good reason for covering each bite．The plastic keeps pieces of food from traveling in the spaceship．On the earth very small pieces of food would simply fall to the floor．But gravity doesn’t pull them to the floor when they are out of the plastic in a spaceship．They move here and there and can get into a man’s eyes or into the spaceship’s instruments． If any of the instruments is blocked, the astronauts may have trouble getting safely home．
As astronauts travel on longer space trips, they must take time to sleep． An astronaut can fit himself to his seat with a kind of seat belt. Or, if he wants to, he can sleep in a sleeping bag which is fixed in place under his seat．But be careful he must put his hands under the belt when he goes to sleep．This is because he is really afraid that he might touch one of controls that isn’t supposed to be touched until later．
小题1:Why would astronauts cover each bite of food in space？____
| A．Because small pieces of food would fall down to the floor． |
| B．Because weightless pieces of food might make trouble when they travel around． |
| C．Because they haven’t enough food for longer trips． |
| D．Because astronauts don’t want to waste food． |
| A．walk just as they do on the earth． |
| B．not eat anything because it’s dangerous． |
| C．control the spaceship when they are sleeping． |
| D．not litter small things or it will make trouble． |
| A．Because he thinks it is comfortable to sleep in that way in space． |
| B．Because he doesn’t want to touch any controls when he sleeps． |
| C．Because the instruments of the spaceship are easily broken． |
| D．Because he is afraid that the seat will move． |
| A．Eating and Sleeping in Space |
| B．How Astronauts Eat in Space |
| C．Food for Space |
| D．How Astronauts Sleep in Space |
A study of 1,000British people has been done by Chris,a British professor and director of the Sleep Assessment and Advisory Service in the UK.It looked at the six most common sleeping positions and which personalities tend to match them.Have a look.
1. Fetus (胎儿) position – This is the most common sleeping position. About 41 percent of the participants said they sleep in this position. These sleepers may appear to be strong but they are usually sensitive (敏感的) and shy. The more they curl (蜷缩) up, the more worried they are.
2. Log position (树干睡姿) – This is the second most common position. People who sleep like a log are usually stubborn.
3. Yearner position (向往型睡姿) – This position says that you are open-minded and eager (急切的) to face challenges.
4. Soldier position – These sleepers lie on their backs with their arms down and close to the body. They are usually reserved and quiet.
5. Freefall position – People who sleep in this position are outgoing (外向的) but feel a lack of control in their lives. This is the least comfortable position.
6. Starfish position – People who sleep like this are good listeners, helpful, and uncomfortable being the center of attention.
小题1:What is the main idea of this passage?
| A．Sleeping position decides personality. |
| B．Sleeping position reflects personality. |
| C．What the six different sleeping positions are like. |
| D．Different people have different sleeping positions. |
| A． | B． | C． | D． |
| A．Those sleeping in fetus position are always strong. |
| B．Those sleeping in log position changes their ideas easily. |
| C．Those sleeping in freefall position usually feel uncomfortable in their lives. |
| D．Those sleeping in starfish position may feel uneasy when focused on. |
| A．Fetus | B．British people | C．People surveyed | D．Sleepers |
The scientist’s knowledge must be exact. There’s no room for half right or right just half the time. He must be as nearly right as the conditions permit. What works under one set of conditions at one time must work under the same conditions at other times. If the conditions are different，any changes the scientist observes in a demonstration(实证)must be explained by the changes in the conditions. This is one reason why investigations are important in science. Albert Einstein，who developed the Theory of Relativity，arrived at this theory through mathematics. The accuracy(正确性)of his mathematics was later tested through investigation. Einstein’s ideas were proved to be correct. A scientist uses many tools for measurements. Then the measurements are used to make mathematical calculations(计算)that may test his investigations.
小题1:What makes a scientist according to the passage？
| A．The tools he uses. | B．His ways of learning. |
| C．The way he uses his tools. | D．The various tools he uses. |
| A．the importance of information |
| B．the difference between scientists and ordinary people |
| C．the importance of thinking |
| D．the difference between carpenters and ordinary people |
| A．works under one set of conditions at one time and also works under the same conditions at other times |
| B．doesn’t allow any change even under different conditions |
| C．leave no room for improvement. |
| D．can be used for many purposes |
| A．Scientists are different from ordinary people. |
| B．The Theory of Relativity. |
| C．Exactness is the core(核心)of science. |
| D．Exactness and way of using tools are the keys to making of a scientist. |
Explore your library. Visit your local library to borrow books and magazines that your kids haven’t seen before. Many libraries have summer reading programs, book clubs, and reading contests(比赛) for even the youngest borrowers. With a new library card，a child will feel extra grownup by borrowing books.
Read on the road. Going on a long car trip？Make sure there are some books at the back seat. When you stop driving，read the books aloud. Get some audio books in libraries and listen to them together during driving time.
Make your own books. Pick one of your family’s favorite parts of summer—whether it’s baseball，ice cream, or the pool—and have your child draw pictures of it or cut out pictures from magazines. Stick(粘贴) the pictures onto paper to make a booklet(小册子)and write text for it. When you’re done，read the book together. Reread it whenever you like!
Keep in touch. Kids don’t have to go away to write about summer vacation. Even if your family stays home，they can send postcards to tell friends and relatives about their adventures(冒险经历). Ask a relative to be your child’s pen pal and encourage them to write each week.
Keep up the reading habits. Even if everything else changes during the summer，keep up the reading habits around your house. Read with your kids every day—whether it’s just before bedtime or under a shady tree on a lazy afternoon. And don’t forget to take a book to the beach！Just brush the sand off the pages — it’s no sweat!
小题1: The purpose of the passage is to________.
| A．encourage parents to read |
| B．give advice on raising kids |
| C．raise a good summer reader |
| D．suggest places for vacations |
| A．visit the local library and join book clubs |
| B．borrow some audio books to listen to |
| C．keep in touch with friends by sending postcards |
| D．read your own picture books with your son |
| A．taking away the sand on the book is very difficult |
| B．a special book is needed when you’re reading on the beach |
| C．one can remove the sand on the book with a brush easily |
| D．there’s no trouble reading even on the beach |
| A．Parents. | B．Students. | C．Teachers. | D．Editors. |
| A．During summer vocation, kids’ reading skills must grow cold. |
| B．Kids have to go away to write about summer vacation. |
| C．With a library card，a child will feel extra grownup by borrowing books. |
| D．Because everything else changes during the summer，it is hard to keep up the reading habits. |
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