Ever wonder how much a cloud weighs? What about a hurricane? A meteorologist has done some estimates and the results might surprise you.
Let"s start with a very simple white puffy cloud — a cumulus cloud（积云）. How much does the water in a cumulus cloud weigh? Peggy LeMone, senior scientist at the National Center for Atmospheric Research in Boulder, Colorado, did the numbers. "The water in the little cloud weighs about 550 tons," she calculates. "Or if you want to convert it to something that might be a little more meaningful … think of elephants."
The thought of a hundred elephants-worth of water suspended in the sky begs another question — what keeps it up there?
"First of all, the water isn"t in elephant sized particles（微粒）, it"s in tiny tiny tiny particles," explains LeMone. And those particles float on the warmer air that"s rising below. But still, the concept of so much water floating in the sky was surprising even to a meteorologist like LeMone. "I had no idea how much a cloud would weigh, actually, when I started the calculations," she says.
So how many elephant units of water are inside a big storm cloud—10 times bigger all the way around than the "puffy" cumulus cloud? Again, LeMone did the numbers: About 200,000 elephants.
Now, ratchet up the calculations for a hurricane about the size of Missouri and the figures get really massive. "What we"re doing is weighing the water in one cubic meter theoretically pulled from a cloud and then multiplying by the number of meters in a whole hurricane," she explains.
The result? Forty million elephants. That means the water in one hurricane weighs more than all the elephants on the planet. Perhaps even more than all the elephants that have ever lived on the planet.
小题1:The weight of is NOT mentioned in the passage.| A．a cumulus cloud | B．a tornado | C．a hurricane | D．a storm cloud |
小题2:How did Peggy LeMone feel about the result of her calculations?| A．She found it not convincing. | | B．She thought it needed further calculations. | | C．She was quite surprised at it. | | D．She considered the calculations inaccurate. |
小题3:What can be inferred from the passage?| A．A storm cloud weighs about 200,000 elephants. | | B．The water in a hurricane weighs more than that in any other kind of cloud. | | C．There are less than forty million elephants living on the earth. | | D．The water in the cloud is in very tiny partials. |
|
小题1:B
小题2:C
小题3:C |
试题分析:本文是一篇说明文，说明了气象学专家对以多云和飓风、一朵积云重量进行测试，测量结果令人吃惊
小题1:细节题，由第一段第一行Ever wonder how much a cloud weighs? What about a hurricane和第二段第一行a cumulus cloud可以知道答案，故选B。
小题2:细节题，由第一段最后一句A meteorologist has done some estimates and the results might surprise you.可以知道答案，所以选C。
小题3:细节题，由最后一段最后一句Perhaps even more than all the elephants that have ever lived on the planet可以知道答案，所以选C
点评：本文主要考查细节题，做细节题的关键是找出原文的根据，认真核查题支和原文的异同，常犯错误有：绝对化语言，范围扩大或缩小，以偏概全，张冠李戴等。考生首先要仔细阅读短文，完整了解信息，准确把握作者观点。 |
核心考点
试题【Ever wonder how much a cloud weighs? What about a hurricane? A meteorologist has】；主要考察你对
题材分类等知识点的理解。
[详细]举一反三
How would you like to learn more without having to study more？Here’s how：
1．Get to bed and go to sleep.Your performance，attention，and the ability to concentrate are damaged by lack of sleep.Teenagers need nine to ten hours of sleep a night for best performance.
2．Feed your head.The brain runs badly if it doesn’t get enough fuel.That means protein(蛋白质)and complex carbs (复合碳水化合物)－eggs and wheat bread for breakfast，say，rather than sugary cereal(含糖的麦片粥)and orange juice.The biggest mistake teens make is not to have breakfast or to go for sugar，which raises blood sugar levels.
3．Body exercise is brain exercise.Body exercise really improves brain performance，perhaps because it increases blood flow，or perhaps because it reduces stress and anxiety(焦虑).Twenty minutes of activity a day that raises your heart rate will do great good.
4．Learn now what you want to remember for the rest of your life.Teenage brains are much better at remembering things than the brains of young children or adults.Scientists aren’t sure why.Whatever the reason，the teenage years are the time to learn new languages and master other lifelong skills.
5．Learn the power of risk taking.Adults are always worried about the downside of teenage risktaking，and it’s true that teenagers are more likely than adults to get themselves in trouble by drinking and driving.But the fact that the parts of the brain that drive people to try new，risky，and exciting things appear to be more developed in teenagers can be a huge advantage.Pick certain challenges－difficult sports，a hard job，mastering a performance art，traveling overseas－and the teenage brain is able to deal with them.They have this power they’re given to go out and do it without fear.
6．Learn what you love.Because emotional(情感的)systems develop fast in teenager brains，teenagers learn things they’re interested in quickly and well.Their brains give them tools like attention on the project.
小题1:According to the passage，teenagers should have for breakfast.| A．wheat bread and eggs | B．sugar and orange juice | | C．sugar and bread | D．wheat bread and orange juice |
小题2:Body exercise plays a part in all the following EXCEPT .| A．making people less anxious | B．raising heart rate | | C．reducing blood pressure | D．reducing stress |
小题3:The underlined word “downside” in the passage probably means .| A．excitement | B．disadvantage | | C．benefit | D．power |
小题4:It can be learned from the passage that .| A．teenagers learn quickly when they are fond of something | | B．teenagers should be forbidden to drive | | C．scientists know why teenagers have a good memory | | D．teenagers need less sleep than adults |
|
A farmer found a wounded eagle (鹰) in his field. He was so 26 that he took it home and cleaned its wounds. After that he placed it 27 in the yard, in the hope that it 28 recover soon.
Strangely enough, the eagle soon got used to the 29 of all the chickens in the yard. It learned to 30 from side to side like chickens, and eat happily from a trough (食槽). For many years, the eagle 31 his new life on the farm.
Then one day, one of the farmer’s friends pointed to the playing 32 and asked, “ 33 is that eagle acting like a chicken?” The farmer told him what had 34 , and the friend felt quite 35 .
“I can’t believe that!” said the friend. “It should fly in the 36 , not live here!” He picked up the eagle, and 37 it into the air. The eagle was 38 , and cried loudly. Then it just fell down on the ground.
That night, the friend could 39 sleep as he remembered the chicken-like eagle. The next morning, he headed back to the farm for another 40 . This time he carried the eagle to the 41 of a nearby mountain.
When he stood at the highest place of the mountain, he looked into its eyes and shouted, “Don’t you 42 ? You weren’t made to live like a chicken!” As he 43 the eagle up, he made sure it was facing into the bright 44 of the rising sun. Then he 45 tossed (抛) the bird into the sky. This time the eagle opened his wings, and disappeared into the clouds.
| 小题1: | | A．polite | B．brave | C．kind | D．proud |
|
| 小题2: | | A．forward | B．outside | C．inside | D．backward |
|
| 小题3: | | A．would | B．should | C．must | D．need |
|
| 小题4: | | A．food | B．sounds | C．water | D．habits |
|
| 小题5: | | A．walk | B．sleep | C．talk | D．drink |
|
| 小题6: | | A．wasted | B．forgot | C．lost | D．enjoyed |
|
| 小题7: | | A．chicken | B．eagle | C．farmer | D．plane |
|
| 小题9: | | A．suffered | B．experienced | C．happened | D．found |
|
| 小题10: | | A．pleased | B．surprised | C．worried | D．satisfied |
|
| 小题12: | | A．pulled | B．moved | C．took | D．threw |
|
| 小题13: | | A．afraid | B．interested | C．excited | D．angry |
|
| 小题14: | | A．hardly | B．exactly | C．actually | D．finally |
|
| 小题15: | | A．drink | B．meeting | C．rest | D．try |
|
| 小题16: | | A．top | B．foot | C．center | D．side |
|
| 小题17: | | A．believe | B．cry | C．understand | D．work |
|
| 小题18: | | A．held | B．put | C．filled | D．tied |
|
| 小题19: | | A．sight | B．light | C．space | D．shape |
|
| 小题20: | | A．easily | B．softly | C．quickly | D．powerfully |
|
|
Many years ago in a small village, an old man was hired to clear the spring (泉水) up on the mountain. He patrolled (巡逻) the spring every day, and swept away all the leaves and other things that would dirty the fresh flow of water. Soon, beautiful swans (天鹅) came to the clear spring, and the village became a popular attraction for visitors.
Years passed. One evening the town leaders held a meeting. As they looked at the salary list, one of them said, “Why do we keep this old man on year after year? I don’t think we need him or his work.” Later, the old man was asked to leave.
For several weeks, nothing changed. By early autumn, the leaves began to fall off the trees, and the spring was covered with leaves. A few days later, the water was much darker. Only a few months after the old man left, all the swans left, as did the tourists. Disease reached deeply into the village.
Quickly, the leaders held a special meeting. Realizing their mistake, they rehired the old man. Then within a few weeks, the spring began to clear up. Soon new life returned to the village.
So, my friends, do you see? No matter how small your work or your life seems to be, never overlook it. Anything we can do will make a difference.
小题1:The leaders decided to ask the old man to leave because they thought ______.| A．his work was unnecessary | B．he did his work carelessly | | C．he was too old to do the job | D．he could do other better jobs |
小题2:How did the leaders feel a few months after the old man left?| A．Regretful. | B．Moved. | C．Excited. | D．Calm. |
小题3:What does the underlined word “overlook” mean in the last paragraph?| A．Believe. | B．Ignore(忽略). | C．Praise. | D．Punish. |
小题4:With this story, the writer wants to tell us that ______. | A．even a small job can be important | B．work can bring old people happiness | | C．everyone should always respect others | D．everyone can be his own master |
|
It’s school time again! You’re probably feeling excited and maybe a little sad that summer is over. Some kids feel nervous or a little scared（害怕） on the first day of school because of all the new things: new teachers, new friends, and even a new school. Luckily, these “new” worries only stick around for a little while. Let’s find out more about going to a new school.
Most teachers kick off the new school year by introducing themselves and talking about all the stuff you’ll be doing that year. Some teachers give students a chance to tell something about themselves to the rest of the class, too. When teachers do the talking on the first day, they often go over classroom rules and school rules so you’ll know what’s allowed and what’s not. Please pay close attention
You might already know a lot of people in your classes on the first day, but it’s a great day to make a new friend, so try to say hello to kids you know and new ones that you don’t. Make the first move and you’ll be glad you did, and so will your new friend!
Seeing friends you haven’t seen for some time can make the first day a good one. You can make the day feel special by wearing clothes that you really like. Maybe you got a great T-shirt on one of your vacations, or a pair of sneakers（运动鞋）. It also can make you feel good to be prepared and have all the things you need, such as pencils, folders, and whatever else you’ll be needing. But make sure that you pack them the night before in case you don’t have time in the morning.
小题1:The underlined phrase “kick off” in the second paragraph probably means “_____”. | A．start | B．study | C．find | D．teach |
小题2:The last paragraphs mainly tell us about ________. | A．what to know about a new school | | B．how to prepare for a new school | | C．what to do on your first day of school | | D．how to spend your first day of school |
小题3:According to the passage you usually do everything on the first day of school except _______. | A．introduce yourself | B．learn about the school rules | | C．make new friends | D．go over your new lessons |
小题4:If you happen to see an old friend on the first day of school, from the passage we know that you will feel ________ | A．nervous | B．lucky | C．happy | D．excited |
|
The UK has a wellrespected higher education system and some of the top universities and research institutions in the world. But to those who are new to it all, sometimes it can be confusing．
October is usually the busiest month in the college calendar. Universities have something called Freshers’ Week for their newcomers. It’s a great opportunity to make new friends, join lots of clubs and settle into university life．
However, having just left the comfort of home and all your friends behind, the prospect（前景）of meeting lots of strangers in big halls can be nervewracking（令人头痛的）. Where do you start? Who should you make friends with? Which clubs should you join?
Luckily, there will be thousands of others in the same boat as you worrying about starting their university social life on the right foot. So just take it all in slowly. Don’t rush into anything that you’ll regret for the next three years.
Here is some top advice from past students on how to survive Freshers’ Week：
●Learn rules. Make sure you know British social etiquette（礼节）. Have a few wine glasses and snacks handy for your housemates and friends.
●Be kind. Sometimes cups of tea or even slices of toast can give you a head start in making friends.
●Be sociable. The more active you are, the more likely you’ll be to meet new people than if you’re someone who never leaves their room.
●Bring a doorstop. Keep your door open when you’re in and that sends positive messages to your neighbors that you’re friendly.
So with a bit of clever planning and effort, Freshers’ Week can give you a great start to your university life and soon you’ll be passing on your experience to next year’s new recruits．
小题1:Which of the following statements is FALSE according to the passage？| A．October is generally the busiest month for universities． | | B．It’s a good idea to have a doorstop. | | C．A bit of planning can make Freshers’ Week easier. | | D．The first week of your every year at university is called Freshers’ Week． |
小题2:The underlined word "recruits" in the last paragraph refers to__________．| A．courses | B．freshers | C．neighbors | D．challenges |
小题3:We can infer from the 4th paragraph that ．| A．the newcomers usually miss the days living at home | | B．most of the students in the UK spend three years in universities | | C．many freshers are worried about how to fit university life | | D．all the new students will make new friends and join certain clubs |
小题4:Why does the author suggest having wine glasses and snacks handy？| A．To pass the busy university life． | | B．To help make friends with other freshers． | | C．To show yourself a drinker as others． | | D．To pass the time in a happy way． |
|
