题目列表(包括答案和解析)
| A．before | B．since | C．during | D．after |
| A．taste the chemicals first |
| B．clean al the apparatus |
| C．read al instructions carefuly |
| D．report al the accidents to the teacher |
| A．bring food into the lab | |
| B．enter the lab anytime | |
| C．smel chemicals as you like | D．learn science directly in the lab |
| A．Before the Experiment |
| B．First Aid |
| C．During the Experiment |
| D．After the Experiment |
Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.
You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.
When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.
Your hands and wrists (手腕)
Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.
Enjoy your computer, but use it safely.
【小题1】A computer screen may injure your eyes if __________.
| A．you sit 60 centimeters away | B．you remember to look away |
| C．your eyes are too close to it | D．the window is on your left or your right |
| A．get plenty of exercise | B．move in the same way again and again |
| C．rest your wrists on something | D．keep your elbows as high as the keyboard |
| A．you work near a window | B．you often take a rest from working |
| C．you use a keyboard for a long time | D．the window is behind you |
| A．in the right way | B．for many hours |
| C．with the screen below your eyes | D．with your back leaning forward |
| A．How to protect your eyes | B．How to protect your hands and wrists |
| C．How to use a computer safely | D．How to protect your back |
The Internet, mobile phones and Ipads are part of our lives now. Technology is greatly affecting all ways of our lives, from the ways we work to the ways we play. And it even causes a number of social problems such as cloning humans.
We have had lots of technology and it has changed our lives a lot. There is no doubt that humans will continue to use more and more technology. Here are some examples of modern technology that will change our ideas and will affect our lives greatly.
Global positioning system (GPS) (全球定位系统)
It’s a system that uses radio signals from satellites to show exact(精确地) information. It tells you where the user is on the earth in all weather conditions. It’s made up of three parts: satellites, control equipments (设备) on land and receivers.
Space Technology
Russian and American scientists have worked together for the international Space Station (ISS) for a long time. They hope the ISS will provide a long-lasting lab. Such a lab will bring humans limitless(无限的) advantages. It’s even hoped that one day space technology will take humans to their new houses in space.
Underwater Robot
Hercules is a kind of underwater robot with some high technology equipments. It will be used to search for ancient ships which were destroyed into the deep sea during their journey long ago.
The world is changing so quickly that it’s hard for us to catch up with all the new inventions because they seem to come out every month. It’s important for us to learn about new technology and the role that it plays in our lives. So we should be willing to accept modern technology, or we will fall behind the times.
1.______ can tell you where the user is on the earth exactly.
A．Satellites B．Receivers
C．Global Positioning System D．Underwater Robot
2.According to the passage, which is NOT true about the ISS?
A．It has carried people to other planets.
B．It will provide a long-lasting lab for us.
C．Russian and American are working for it.
D．Humans will get a lot of advantages from it.
3.Hercules is used to ______.
A．save lives in the sea B．take picture in the sea
C．repair the broken ships D．look for the ancient ships in the sea
4.From the passage, we know that ______.
A．the use of GPS is affected by the weather conditions
B．it’s very important for us to learn about new technology
C．it’s easy for us to catch up with all the new inventions
D．technology brings us many advantages such as cloning humans
5.What is the purpose of the passage?
A．To help us study some new technology.
B．To tell us technology is changing the world.
C．To help solve the problems that technology causes.
D．To remind us the advantages of technology are limitless.
In England recently three foreign gentlemen came to a bus stop and waited. About five minutes later, the bus they wanted came along. They were just going to get on when suddenly there was a loud noise behind them. People rushed onto the bus and tried to push them out of the way. Someone shouted at them. The bus conductor came rushing down the stairs to see what all the trouble was about. The three foreigners seem all at sea and looked embarrassed (窘迫的). No one had told them about the British custom (习惯)of lining up for a bus that the first person who arrives at the bus stop is the first person to get on the bus .
Learning the language of a country isn't enough. If you want to have a pleasant visit, find out as much as possible about the manners and customs of your host country. You will probably be surprised just how different they can be from your own. A visitor to India would do well to remember that people there consider it impolite to use the left hand for passing food at table. The left hand is supposed to be used for washing yourself. Also in India, you might see a man shaking his head at another to show that he doesn't agree. But in many parts of India a shake of the head means agreement. Nodding your head when you are given a drink in Bulgaria will most probably leave you thirsty. In that country, you shake your head to mean 'yes'— a nod means ‘no’. At a meal in countries on the Arabic Peninsula, you will find that your glass is repeated refilled as soon as you drink up. If you think that you have had enough, you should take the cup or glasses in your hand and give it a little shake from side to side or place your hand over the top.
In Europe it’s quite usual to cross your legs when you are sitting talking to someone even at an important meeting. Doing this in Thailand, however, could bring about trouble. Also, you should try to avoid (避免)touching the head of an adult ——it's just not done in Thailand .
【小题1】 The British people tried to push the three gentlemen out of the way, because the gentlemen _________.
| A．were foreigners | B．didn't have tickets |
| C．made a loud noise | D．didn't line up for the bus |
| A．If you want to have a pleasant journey in a foreign country, you only need to learn the language of the country. |
| B．In India it is considered polite to touch an adult’s head. |
| C．To cross one's legs at an important meeting in Europe is a common habit. |
| D．In Bulgaria, if you don’t want to drink, you should cover the cup with your hand. |
| A．People's Everyday Life | B．Mind Your Manners |
| C．Habit is quite important | D．Language and customs |
Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.
You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.
When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.
Your hands and wrists (手腕)
Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.
Enjoy your computer, but use it safely.
【小题1】A computer screen may injure your eyes if __________.
| A．you sit 60 centimeters away |
| B．you remember to look away |
| C．your eyes are too close to it |
| D．the window is on your left or your right |
| A．get plenty of exercise |
| B．move in the same way again and again |
| C．rest your wrists on something |
| D．keep your elbows as high as the keyboard |
| A．you work near a window |
| B．you often take a rest from working |
| C．you use a keyboard for a long time |
| D．the window is behind you |
| A．in the right way |
| B．for many hours |
| C．with the screen below your eyes |
| D．with your back leaning forward |
| A．How to protect your eyes |
| B．How to protect your hands and wrists |
| C．How to use a computer safely |
| D．How to protect your back |
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