题目
题型：不详难度：来源：
1．Wearing the wrong type of glasses will do harm to your eyes .
This is not true for adults , although incorrect glasses may not be good for children under 10 . Ready-made glasses , and not wearing when you should , won’ t do harm to your eyes , but you may see better with glasses that are specially made for you .
2．Watching too much television is bad for you eyes .
This is not true. People with easily affected eyes may find they get red and aching from staring at a fixed distance for long periods , but there won’ t be any lasting effects .
3. Carrots will help you see in the dark. Carrots are rich in beta-carotene, which the body can change into vitamin A, too little of which can cause night blindness. However , people in most countries don’ t need to worry about vitamin A deficiency（缺乏）, night blindness is more likely to be connected with another vision problem .
小题1:According to the passage , which of the following is TRUE ?
A．Ready-made glasses will do harm to one’s eyes.
B．Wearing the wrong glasses may do harm to children’s eyes.
C．The human body is unable to change beta-carotene into vitamin A.
D．Watching less television may do harm to children’s eyes.
小题2:Night blindness is most likely caused by _____ .
| A．staring for long periods |
| B．too much beta-carotene |
| C．not enough vitamin A |
| D．vision problems |
| A．wearing specially-made glasses |
| B．performing eye exercises |
| C．cutting back on television |
| D．eating more carrots |
| A．night blindness |
| B．lasting eye problems |
| C．a number of vision problems |
| D．eye trouble for a limited time |
| A．tell people of the importance of their eyes |
| B．tell people how to protect their eyes |
| C．tell people to have more carrots |
| D．tell people something more about their eyes |
答案
小题1:B
小题2:D
小题3:A
小题4:D
小题5:D
解析
试题分析：这篇短文主要通过求证的方式解答了佩戴不对型的眼镜、过多的看电视不会对眼睛造成伤害；胡萝卜素也未必能帮助你在黑暗中看清事物。
小题1:细节理解题。根据短文 incorrect glasses may not be good for children under 10 的描述可知，佩戴眼镜不当回对孩子的眼睛有害。故应选B。
小题2:细节理解题。根据短文night blindness is more likely to be connected with another vision problem 的描述可知，夜盲症可能是由视力问题引起的。故选D。
小题3:细节理解题。根据短文 you may see better with glasses that are specially made for you 的描述可知，特制的眼镜可以帮助改善视力。故选A。
小题4:细节理解题。根据短文People with easily affected eyes may find they get red and aching from staring at a fixed distance for long periods , but there won’ t be any lasting effects的描述可知，过多的看电视会在有限的时间内导致眼睛问题。故选D。
小题5:细节理解题。联系上下文可知，这篇短文主要通过解答佩戴不对型的眼镜、过多的看电视不会对眼睛造成伤害；以及胡萝卜素也未必能帮助你在黑暗中看清事物等问题，告诉人们更多关于眼睛的知识。故选D。
核心考点
试题【Is it true ?1．Wearing the wrong type of glasses will do harm to your eyes .This 】；主要考察你对科普环保类等知识点的理解。[详细]
举一反三
“That test was not only a test of knowledge, but also a test of morality（道德）. We wanted to show the students how important honesty（诚实）is,” said the school’s headmaster. Next year, it wants 80% of its exams to be without teachers. But students have different ideas.
“I was happy and excited during the exam because my teachers trusted（信任）me,” said a 15-year –old girl in Class 11.
“Schools must trust students a lot and do not use invigilators（监考人）in exams. But I think it is too early. Some students will cheat（作弊）if there are no invigilators. And the students will not be able to ask for help when they need,” said another student.
“I don’t like having invigilators in exams. When they walk around the classroom, they make me nervous. I would get higher marks without them in the room because I would feel more relaxed,” a third student said.
“I think it’s very important to have invigilators in exams. Many students want to check their answers with each other after they have finished papers. And invigilators can also keep the classroom in order when something unusual happens. They may make me nervous, but I still think we need them,” a girl student said.
No-teacher exams may be a good idea. But before using them, schools must tell students the importance of honesty and try to find ways to solve something unusual in exams.
小题1:Why did No. 35 Middle School of Shenyang hold a no – teacher exam?
| A．Because the teachers were too busy with their work. |
| B．Because it wanted to show the students the importance of honesty. |
| C．Because the students didn’t need their teachers to invigilate. |
| D．Because the headmaster wanted to know who cheats in exams. |
| A．One | B．Two | C．Three | D．Four |
| A．Students | B．Teachers | C．Invigilators | D．No-teacher exams |
| A．More students will cheat if there are no invigilators in exams. |
| B．No-teachers exams can make students honest and get good grades. |
| C．Most students are worried about having no invigilators in class exams. |
| D．Some students may feel relaxed if there are no invigilators in exams. |
Scientists have found that all people yawn. Babies start to yawn even before they are born. The earliest yawn takes place when a baby is still inside its mother. When young children are about one year old, they start to yawn when they see others yawning. That’s why scientists seem to think yawning is contagious.
It’s no secret that yawning is contagious, but why do we yawn? Well, scientists are not really sure.
Some think we yawn because we feel bored. Recently scientists studied two groups of students between the ages of 17 and 19. One group watched music videos, and the other watched a boring color test. Scientists compared the numbers of their yawns and found that the color test group yawned more times than the video group.
Another reason for yawning has to do with breathing. Some scientists believe that when we are bored or tired, we breathe more slowly. As our breathing slows down, we cannot get rid of （去除）enough carbon dioxide, our bodies will tell the brains（大脑）to breathe deeply. The result is a big yawn.
In 2007, scientists suggested a new reason. They said that the reason why people yawned was to cool down their brains. These scientists found that people who were warmer than others yawned more often.
Scientists are still trying to find out why yawning happens and why it is so contagious. But they are only sure that when one person yawns, almost everyone else nearby wants to yawn, too.
小题1:The underlined word “contagious” in Paragraph 1 means _________.
| A．helpful to our health |
| B．passing from one person to another |
| C．hard to understand |
| D．getting into one trouble after another |
| A．born | B．one year old | C．17 or 19 years old | D．inside their mothers |
①People yawn because they are bored
②People yawn to catch others’ attention
③People yawn to cool down their brains
④People yawn to get rid of carbon dioxide.
| A．①②③ | B．②③④ | C．①②④ | D．①③④ |
| A．storybook | B．travel guidebook | C．movie poster | D．science magazine |
When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media(媒质), if the wavelength islong, the scattering will be short. If the wavelength is short, then the scattering will be long.
Of all lights we can see red has the longest wavelength, so the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.
Using the red light can help drivers in farther areas sec the lights. It helps drivers stow down or stop in lime. If drivers don"t see the red light until they are close, they may not be able to stop the car in time. An accident may happen Red can also excite people. We can act more quickly when we see the color red. In a word, red lights help drivers stop in time and help prevent accidents.
小题1:When the traffic lights turn ______, we will stop driving a car.
A. red B green C. yellow
小题2:According to the passage, the scattering of the red light is the _______.
A. longest b. weakest C. farthest
小题3:The underlined word "wavelength" means________ in Chinese.
A.波浪 B.光波 C.波长
小题4:What can the red light help drivers do?
A. It can help drivers in farther areas see the lights.
b. It can help drivers slow down or stop in time.
C. A and b
小题5:Which of the following is the best title?
A. Why do accidents happen
b. How does the red light travel
C. Why do we use red traffic lights
Maybe you think English is very popular in the world, so American students don’t need to learn any other language _____ that’s not true. American kids from the age of seven ____ learn a foreign language. For example ,they learn French or Chinese.
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Now satellites are helping to forecast(预报) the weather . 小题1:______The satellites take pictures of the atmosphere(大气),because this is where the weather forms(形成). 小题2:______So the scientists there can see the weather of any part of the world and tell how the weather will change.
Today, nearly five hundred weather stations in sixty countries can receive satellite pictures. When they receive the new pictures ,they compare(比较) them with the earlier ones . 小题3:_______This may mean that the weather forecast, 小题4:_______
So the weather satellites are of a great help to the scientists at the station. 小题5:________Now they can make good forecasts for 3 or 5 days .Soon perhaps, be able to forecast the weather for a week or more ahead(提前).
| A．In the past they could forecast the weather for about 24 or 48 hours earlier. |
| B．They send these pictures to the weather station . |
| C．they can tell people about it . |
| D．They are in space , and they can reach any part of the world . |
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