题目
题型:不详难度:来源:
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 |
答案
小题1:B
小题2:D
小题3:B
小题4:A
解析
试题分析:文章介绍在太空失重的情况下宇航员怎么吃东西,怎么睡觉,也解释了这样做的原因。
小题1:细节题:从第三段的句子: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. 可知如果食物的碎片可能在他们飞行的时候带来麻烦,选B。
小题2:D细节题:从第三段的句子:If any of the instruments is blocked, the astronauts may have trouble getting safely home.可知在发行中,宇航员不能扔垃圾,否则会有麻烦。选D。
小题3:B细节题:从最后一段的句子: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. 可知宇航员要把手放在安全带的下面,防止它碰到设备。选B。
小题4:A标题题:文章前面三段讲的是宇航员在太空饮食的问题,第四段讲的是宇航员怎么睡觉。选A。
核心考点
试题【Another thing an astronaut has to learn about is eating in space.Food is weightl】;主要考察你对题材分类等知识点的理解。[详细]
举一反三
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. |
Organic mulch improves the condition of soil. As the mulch breaks down, it provides material which keeps the soil from getting hard. This improves the growth of roots and increases the movement of water through the soil. It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants. It also provides good environment for earthworms and other helpful living things in the soil.
It is easy to find organic mulch materials. Cut-up leaves and small pieces of tree bark can be used. Grass cuttings are also a good mulch for plants. Mulch from news- papers works well in controlling weeds.
The best time to add mulch depends on your goal. Mulch provides a thick barrier between the soil and the air. This helps to reduce temperature changes in the soil. As a result, mulched soil will be cooler than other soil in the summer. In winter, the mulched soil may not freeze as deeply as other soil. The best time is after the ground has frozen, but before the coldest weather arrives. Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter. Delaying the spreading should prevent this problem. The animals will probably find another place to live.
小题1:The author tells us the following EXCEPT ______.
A.what mulch is and its advantages |
B.the best time to add mulch |
C.the bad effects of mulch |
D.what can be mulch on the soil surface |
A.tree barks | B.plastic | C.grass cuttings | D.cut-up leaves |
A.improve the condition of soil |
B.improve the ability of the soil to hold water |
C.provide a good environment for earthworms |
D.improve the growth of roots and increase the movement of water through the soil |
A.the best time to add mulch is in spring and summer |
B.the best time to add mulch is after the coldest weather arrives |
C.the best time to add mulch is exactly the same time of each year |
D.choosing the best time to add mulch can avoid attracting small animals |
Scientists have known for a long time that the sun has an 11-year cycle during which radiation measured by sunspots on the surface reaches a peak then falls. But explaining a clear connection to weather is harder.
“Our research confirms the observed connection between solar change and regional winter climate,” lead author Sarah Ineson of the UK Met Office told the reporters in an email. The study was published in the magazine Nature Geoscience on Monday.
The researchers found that the reducing of ultraviolet(UV,紫外线) radiation from the sun can affect high-altitude wind patterns in the Northern Hemisphere(半球), causing cold winters.
“While UV levels won’t tell us what the day-to-day weather will do, they show us the bright future of improved forecasts for winter conditions for months and even years ahead. These forecasts play an important role in long-term possibility planning,” Ineson, a climate scientist, said.
Ineson and colleagues from Imperial College London and the University of Oxford used satellite data that more accurately(精确的) measures UV radiation from the sun and found a much greater change than previously thought.
They found that in years of low activity, unusually cold air forms high in the atmosphere over the tropics. This causes a redistribution(重新分配) of heat in the atmosphere, making easterly winds that bring freezing weather and snowstorms to northern Europe and the United States and milder weather to Canada and the Mediterranean.
When solar UV radiation is stronger, the opposite occurs.
More study was needed, though. A key uncertainty in the experiment lay in the satellite data used, because it covers only a few years. “So questions remain concerning both accuracy(精确) and also applicability to other solar cycles,” she said.
小题1:The new finding claims cold winters in the North Hemisphere can be caused by ______.
A.a sharp rise in the amount of sunspots |
B.a drop in the sun’s UV radiation |
C.a complex computer model simulation |
D.a clear link between the sun and the earth |
A.UV radiation can affect high-altitude wind patterns |
B.there’s a clear connection between the sun’s activity and weather |
C.the sun’s radiation reaches a peak every eleven years |
D.they can predict day-to-day weather conditions from UV levels |
A.Canada and the Mediterranean will have milder weather. |
B.The whole Northern Hemisphere will suffer from extreme winter days. |
C.Freezing cold weather will appear in northern Europe. |
D.Burning hot weather will appear in the United States. |
A.researchers have analyzed the data collected in eleven years |
B.long-term weather conditions can be accurately predicted depending on UV levels |
C.the research doesn’t seem correct and true enough due to limited satellite data used |
D.climate scientists have just begun their research in severe weather forecast |
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