题目
题型：不详难度：来源：
Have you ever wondered?
1. Why do airplanes take longer to fly west than east?
It can take five hours to go west-east from New York (NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon (大气现象) known as the jet stream (气流). The jet stream is a very high altitude (=" above" sea level) wind which always blows from the west to the east across the Atlantic. So the planes moving at a constant air speed go faster from the west to the east when they are moving with the wind than in the opposite.
2. What would happen if the gravity on Earth was suddenly turned off?
Supposing we could magically turn off gravity. Would buildings and other structures（建筑物）float away? What happened would depend on (依靠) how strongly the things were attached (吸附) to the earth. The earth is moving at quite a speed, moving at over a thousand miles per hour. If you turn something around your head on a string, it goes around in a circle until you let go of the string. Then it flies off in a straight line. ‘Turning off’ gravity would be like letting go of the string. Things not attached to the earth would fly off in a straight line. People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling (=" top" surface of a room). Most things outside would fly off into space.
小题1:What information can we get from the first passage?
| A．It is the jet stream that affects how fast airplanes fly. |
| B．Planes go slower when they are moving with the wind. |
| C．It takes more time to fly from NY to London than from London to NY. |
| D．The jet stream always blows from the east to the west across the Atlantic. |
| A．send for | B．move quickly | C．come out | D．grow quickly |
| A．buildings and other structures would float away |
| B．trees and buildings would not so easily fly off |
| C．something around your head would not float away |
| D．everything outside buildings would fly off into space |
| A．In a research paper. | B．In a short story. |
| C．In a travel magazine. | D．In a student’s book |
答案
小题1:A
小题2:B
小题3:B
小题4:D
解析
试题分析：这篇短文中讲述了两个科学常识。一是为什么飞机向西飞比向东飞用的时间长。而是一旦地球引力消失会发生什么事情。
小题1:根据The reason for the difference is an atmospheric phenomenon (大气现象) known as the jet stream (气流).及下文描述可知选A。
小题2:结合下文at a great speed可知选B，快速的移动。
小题3:根据‘Turning off’ gravity would be like letting go of the string.及上文描述可知选B，树木和建筑也不是那么容易的飞走。
小题4:这是一篇有关天文地理的知识性短文，最有可能在学生课本上见到，故选D，为最佳答案。
点评：阅读短文时注意文中对两种科学现象的说明，注意分析其表达的含义，注意通过上下文之间的连词，分析句子关系。有些问题的答案需要结合相关语句认真分析才能得出答案，故答题前一定要多读几遍短文。然后在带着问题在文中寻找信息，完成阅读。
核心考点
试题【Have you ever wondered?1. Why do airplanes take longer to fly west than eas】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
Sun Liping, 6 , lives in a small village in Yunnan. Her biggest wish is to have running water in her home. All 35 families in Sun’s village have a serious problem--- they don’t have enough water. Every day, the villagers have to walk 20 minutes to get water.
Last year, the worst drought since the 1950s hit Yunnan, making more than 2 million people short of drinking water. This year, the drought is even worse.
Not only Yunnan, but many other provinces in China are short of water as well, such as Gansu and Qinghai.
According to a report on February 17, each Chinese person has about 28% of the world’s average（平均的） person’s amount of available(可用的) water. Two thirds of China’s cities are short of water and nearly 300 million people in rural areas don’t have safe water for drinking.
Every drop of water is important. Waste a drop of water a day and you lose a bucket(桶) a year. How can we use water in a smart way? Here are some tips for you to save water in your daily life:
1. Put plastic bottles of water in your toilet to cut down the water waste when you flush (冲洗) your toilet.
2. Don’t keep the water running while you’re brushing your teeth or washing your face and hands.
3. Use low-flow(低流量) shower heads .
4. Use a bucket to collect shower water while you wait for it to warm up.
5. Make your shower time shorter.
6. Set up a rain bucket to collect rainwater for watering plants or flowers.
小题1: What is the problem in Sun’s village?
| A．They don’t have enough food. |
| B．They don’t have enough water. |
| C．They have to walk far away to go to school. |
| D．There are fewer and fewer villagers. |
| A．饥饿 | B．干旱 | C．水灾 | D．贫穷 |
A. China has just 28 percent of the world’s available water.
Each Chinese person can use more water than the world’s average person.
There is not enough water in two thirds of China’s cities.
D. There are about 300 million people in China’s cities who don’t have enough water.
小题4:Which of the following would lead to a waste of water?
| A．Using low-flow shower heads. |
| B．Collecting shower water while waiting for it to warm up. |
| C．Taking a quick shower. |
| D．Keeping the water running while brushing one’s teeth. |
C
“Everything happens for the best.” Whenever I faced disappointment, my mother would say this to me.
After I graduated form college in 1932, I decided to find a job in radio as a sports announcer(广播员). I went to Chicago and knocked at the door of every station. But unluckily, I was refused every time.
At one station, a kind lady told me that big stations wouldn’t hire(雇佣) a person without any experience and suggested that I try my luck at smaller stations. Following her advice, I went back to Dixon, where I had grown up. There were no such jobs in Dixon, and my father said a newly-opened store wanted a local athlete to work for it. I wanted this job, but I was refused again.
“Everything happens for the best,” Mom reminded me. Dad offered me the car to look for a job. I tried WOC Radio in Davenport, Iowa. The program director, Peter MacArthur, told me they had already hired an announcer.
As I left his office, I felt so frustrated. “How can I become a sports announcer if I can’t get a job in a radio station?” I asked aloud.
While I was waiting for the elevator, I heard someone calling. It was MacArthur. “What was that you said about sports? Do you know anything about football?” Then he asked me to have a try. He was pleased with my performance, and he offered me a chance to work there.
On my way home, I thought of my mother’s words: “If you carry on, one day something good will happen. Something wouldn’t have happened if without the failure before.”
小题1:Why couldn’t the writer find a job at big radio stations?
| A．Because he never graduated from college. |
| B．Because he didn’t work hard in college. |
| C．Because he didn’t have much experience. |
| D．Because he didn’t know about sports. |
a. The writer got a job as a sports announcer at a radio station.
b. The writer was refused when he wanted jobs in Chicago.
c. The writer graduated from college.
d. The writer went back to his hometown to look for a job.
| A．cbda | B．cbad | C．bcda | D．bcad |
| A．The writer’s parents didn’t want him to be a sports announcer. |
| B．There were no radio announcer jobs in the writer’s hometown. |
| C．The writer became uninterested in being a sports announcer. |
| D．The writer got a job as a sports announcer in Dixon at last. |
| A．He shouldn’t be a sports announcer. |
| B．Disappointment leads to failure. |
| C．He should be proud of himself. |
| D．Everything will be OK if he keeps trying. |
阅读下面短文，从短文后所给的四个选项中，选出可以填入空白处的最佳选项。
A
In today’s world, pollution has become a serious problem. 51. we know, air pollution is harmful to our health. However, not all people know that noise 52 also a kind of pollution and is harmful to human health.
People who work and live in noisy conditions may become 53 . For example, many of the workers who 54. newspapers and books become deaf. Quite a few people living near 55 also have hearing lose. Recently it was reported that many teenagers in America 56 hear better than the old do, because these young people always listen to 57 pop music. Making a loud noise in public is also a kind of pollution, it not only 58 others but also does great harm to hearing. Cars and machines also produce 59 noise. It makes people feel uncomfortable and unpleasant. 60 , it can cause them to be sick or deaf.Nowadays many countries are trying to solve all sorts of environmental problems, including noise pollution.
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When I was growing up, I had an old neighbor, Dr. Gibbs. He didn’t look like any doctor I’d ever known. He never invited us to play in his yard, but he was a very kind person.
When Dr. Gibbs wasn’t saving lives, he was planting trees. He owned a large field and wanted to make it a forest.
The good doctor had some interesting ideas about planting trees. He never watered his new trees. Once I asked why. He said that watering plants spoiled (宠坏)them, and that if you watered them, each baby tree would grow weaker and weaker, so you had to make things difficult for them and pick out the weaker trees early on.
He talked about how watering trees made for shallow(浅的) roots, and the trees that weren’t watered had to grow deep roots in search of water under the earth by themselves. Deep roots were very important.
So he never watered his trees. He’d planted an oak and, instead of watering it every morning, he’d beat it with a rolled-up newspaper. I asked him why he did that, and he said it was to get the tree’s attention.
Dr. Gibbs died several years after I left home. Every now and then, I walked by his house and looked at the trees that I watched him plant about twenty-five years ago. They’re very big and strong now.
I planted some trees a few years back and carried water to them for a whole summer. After two years of caring too much, whenever a cold wind blows in, they shake a lot.
Every night before I go to bed, I check on my two sons. Mostly I pray(祈祷) that their lives will be easy. But lately I’ve been thinking that it’s time to change my prayer. I know my children are going to face difficulties. There’s always a cold wind blowing somewhere, so what we need to do is to pray for roots that reach deep into the brave heart, so when the rains fall and the winds blow, we could face it strongly and won’t be beaten down.
小题1: We know from the reading the doctor _________.
| A．didn’t know how to plant trees at all |
| B．wasn’t good at his own medical job |
| C．had his own ways of planting trees |
| D．had nothing to do but plant trees |
| A．some weak trees would be easily found out at the beginning |
| B．he would choose the weak trees to water earlier |
| C．the weak trees would be sent to his patients later |
| D．he would not plant weak trees so early anymore |
| A．should beat his trees with a rolled-up newspaper |
| B．didn’t often water his trees |
| C．didn’t have a large field |
| D．took too much care of his tree |
| A．his trees will be stronger than Dr. Gibbs |
| B．his trees will not be beaten down |
| C．his sons will be better at planting trees |
| D．his sons will be able to face difficulties |
| A．Watering Trees | B．Growing Roots |
| C．Doctors and his Neighbor | D．Father and his Children |
Stop. Listen! What do you hear? You may hear many different sounds. Some of those sounds may be noise. Noise is a loud or unwanted sound.
Noise can be caused by many kinds of machines, such as motorcycles, jet planes, farm tractors(拖拉机), rock music is also noise.
What happens to people who live near noisy machines or use them over a period of time? Doctors have found that these people have trouble in sleeping. But, most important, constant(不断的) loud noise can cause a loss of hearing.
Scientists use a unit of measure called decibel(分贝) to measure the loudness of a sound. The sound of a quiet room, for example, measures 35 decibels. Talking measures between 40 and 65 decibels. Sounds from traffic and from some rock bands can measure over 120 decibels. Noise at this high level(层次) causes the great hearing loss.
根据短文内容，选择正确的答案（每小题1分，共5分）
小题1:According to the passage, noise is .
| A．any kind of sound | B．a loud or unwanted sound |
| C．all sounds that you can hear | D．terrible sound |
| A．unit that measures sound | B．kind of noise |
| C．machine that makes loud noise | D．person who hates sound |
| A．help people to sleep better | B．stop machines |
| C．cause a loss of hearing | D．kill people |
| A．noise is a serious problem | B．rock music isn’t noisy |
| C．noise is only from traffic | D．some people hate any sound |
| Room Noise Level A 40~65 decibels B 35 decibels C 120 decibels D 130 decibels |
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