阅读理解 Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bicycle a...

题型：阅读选择题类：模拟题难易度：困难

四川省绵阳市安州区2018届九年级下学期英语二诊试卷

阅读理解

Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bicycle and break your arm, it happens very quickly. But computer injuries happen slowly.

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(反射) on the screen. If the windows 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 times, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows at the same height as the keyboard. 3) Stop sometimes 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 a 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 be in front of your eyes. Your forearms(前臂), wrists and hands should all be parallel to(与......平衡) the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and neck.

Enjoy your computer, but use it safely.

（1）、The underlined word “injure” means “ .”

A、保护 B、影响 C、伤害 D、帮助

（2）、Your eyes should .

A、be close to the screen B、be less than 50 centimeters from the screen C、face the window D、be more than 50 centimeters from the screen

（3）、To protect your hands and wrists you should .

A、Keep your elbows above the height of the keyboard B、Keep your wrists hanging without touching anything C、Keep your elbows below the height of the keyboard D、Stop playing computer sometimes and exercise

（4）、Which of the following is true?

A、Sitting wrongly is only bad for your wrists and fingers. B、Your eyes should be at the same height as the top part of the screen. C、You should have a rest every two hours. D、You should sit in front of a screen and play computer for a long time.

（5）、Which is the best title of this passage?

A、How to Use a computer Safely. B、How to Play Computer Games. C、How to Protect Your Eyes. D、Computers Are very Harmful.

举一反三

Spiders are not insects as many people believe. They belong to a class of animals called arachnids(蛛形纲动物). Spiders have eight eyes, four pairs of legs, and can grow a new leg if they lose one. A spider's body is divided into two sections: the abdomen(腹部) and the thorax(胸部).The legs, eyes, and mouthparts are in the thorax section.

Most spiders have poison glands(毒腺)and sharp teeth. They use their sharp teeth to force poison into the insects they catch for food. This poison can make an insect lose the ability to move, and the helpless insect is then devoured by the spider.

Spiders usually have silk glands under their abdomen. They produce a liquid(液体)that is thicker than water from their glands. When the liquid comes into the air, it dries into silk. Many spiders use this silk to form webs to catch insects and to make cocoons(茧)that protect their eggs. This amazing silk is also used to create lines that spiders hang onto as they travel to new areas.

Spiders live in almost everywhere on earth. The only places where there are no spiders are the coldest places, the highest mountains and the seas.

Some advice on travel
Here is some advice on travel. I think it will be helpful to you.
1. Forget fashion! Always wear your most comfortable clothes and shoes when you go on long trips.
2. If you're going somewhere cold, remember to take your warm clothes with you.
3. If you are going somewhere sunny, remember to take some sun block(防晒霜) and sunglasses.
4. Traveling on trains and buses can be boring, so you'd better take an MP4 player.
5. Always take a camera with you to capture those special moments.
6. Be careful with your things whenever you go to crowded places, like a train station.
7. Always leave room in your bag for souvenirs(纪念品).
8. Tour buses often stop at expensive shops along the way. Save your money by buying souvenirs at local shops.
9. Most countries have lower prices for students, so if you are, take your student card with you.
10. If you travel abroad, remember to take your passport.

Carbon monoxide poisoning (一氧化碳中毒) causes death and injuries around the world. This gas is a problem in all parts of the world that experience cold weather. A few years ago, America's Centers for Disease Control (C. D. C.) studied deaths linked (联系) with carbon monoxide poisoning. It found that the number of carbon monoxide deaths in the United States was greatest in January. The C.D.C. also found that carbon monoxide kills more than four hundred Americans each year. And, it said more than twenty thousand people are taken to hospital for treatment of health problems linked with the gas.
Carbon monoxide is called the silent killer because people do not know it is in the air. The gas has no color, no taste and no smell. It does not cause burning eyes. And it does not cause people to cough. Yet, carbon monoxide gas is very deadly (致命的). It steals the body's ability to use oxygen.
Carbon monoxide makes it difficult for the blood to carry oxygen to body tissues (血管). It does this by linking with the blood. When the gas links with the blood, the blood is no longer able to carry oxygen to the tissues that need it. Damage (损害) to the body can begin very quickly from large amounts (数量) of carbon monoxide.
How quickly this can happen depend on how long a person is breathing the gas and how much gas he or she breathes in.
Carbon monoxide poisoning has warning signs(标志). But people have to be awake to realize them. Small amounts of the gas will cause a person's head to hurt. He or she may begin to feel tired. Their stomachs may feel sick. The room may appear to be turning around. The person may have trouble thinking clearly.
People develop serious headache as the amount of the gas continues to enter their blood. They will begin to feel very tired and sleepy. They may have terrible stomachache.
Doctors say carbon monoxide influences people differently. For example a small child will experience health problems or die much sooner than an adult. The general health of the person or his or her age can also be important

    Growing mushrooms（蘑菇）is probably the easiest thing you can do even if you are new to mushroom growing. It is becoming more common because restaurants are starting to create more dishes that include mushrooms.
    Mushroom growing is easy. To start, you need to have a space where you are going to grow these mushrooms. It does not have to be a huge space but just enough for you to grow as many mushrooms as you need. When you have found the space perfect for you, you can start researching what kind of mushrooms you want to grow. There are a lot of mushrooms to choose from and not all of them are suitable to eat.
    When you decide what kind of mushrooms you want to grow, you can start getting ready to plant the mushrooms. Sometimes you may want to hire some workers to help if you have a large mushroom farm, or if you are trying to start a professional mushroom growing business. Trying to have a business by yourself can be stressful. If you don't have enough time to spend taking care of everything yourself, some helpers may be the best choice.
    After you have started the mushroom growing, you should regularly check that your mushrooms grow properly and that they are not being attacked by any pesticides（农药）or any other animals or something that could be dangerous to them. That is the worst part of mushroom developing. Protect your mushroom farm well with a fence（围栏）or a gate so that only you and your workers can get in and out.
    Mushroom growing is not difficult and it is easy to get stared in the world of farming. You will soon possibly be able to provide some of the great cooks of the world with high quality mushrooms that will be enjoyed by thousands of people all over the world.

阅读下列短文，从每小题所给的A、B、C、D四个选项中选出一个最佳选项。
    Would you like to live in a city where buildings turn the lights off for you, and self-driving cars will find the nearest parking space themselves? Although it might sound a little far from you, living in a “smart” city like this could happen sooner than you think.
    Great changes have taken place in towns that we have lived in for centuries, while completely new cities are being built. One such place is the city of Songdo. Every home there will have a “telepresence” system(远程遥控系统)－ allowing users to control the heating and looks, take part in video meetings, and receive education, healthcare and government services. Around the city, escalators(自动扶梯) will only move when someone is on them, and offices and schools will all be connected to the system.
    The great mind behind Songdo is from the company Cisco. In fact, technology companies around the world such as IBM, Siemens and Microsoft are already in the business.
    About 75% of the world's population will live in cities by 2050, so cities will need to be more modern to deal with the coming problems. “making cities smarter is one way out, and I think this will in turn make cities greener,” said Dan Hill, head of a research company.

阅读理解

Zhalong is a nature park in Heilongjiang in Northeast China. It is one of the world's most important wetlands. The area provides food and homes for wildlife. It is an ideal home for different kinds of plants, fishes and birds.

Many birds live comfortably in Zhalong Nature Park all year round, while some only stay for a short time. There are many fish in the wetlands, and the birds can easily catch them for food. Zhalong Nature Park is an important living area for the rare red-crowned cranes. There are not many red-crowned cranes in the world. Some of them live in Zhalong.

Some people want to change the wetlands to make more space for farms and buildings. This means that there will be less and less space for wildlife.

More and more birds are in danger because they do not have enough living space. Many of them died. The Chinese government wants to protect these endangered birds, and they can be safe in Zhalong.

Every year a lot of tourists go to Zhalong to watch birds. This year members of our Bird Watching Club are going to study the different kinds of birds in Zhalong and the changes in their numbers. The study will begin next month.

We do a bird count once a year. We are now inviting the second school students to help. We need more people to help us count and do something to help the birds. Many people do not understand the importance of the wetlands. We hope this information will help them understand it and make them actively take action to protect wildlife.

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