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题型:阅读选择 题类:常考题 难易度:普通

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 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, wrists, hands and the upper 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.

(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
(2)、Hand and wrist injuries are caused when you _________.

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
(3)、Your eyes and hands will be safe if __________.

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
(4)、It is good for your back and neck if you sit __________.

A、in the right way B、for many hours C、with the screen below your eyes D、with your back leaning forward
(5)、What would be the best title for the passage?

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.
举一反三
 阅读理解

Your teacher asks you to collect your classmates' opinions about their favorite school lunches. After asking everyone, you have collected a lot of data(数据) or information and aren't sure how to organize it. Creating a graph (图表) can be a great way to organize and share your data.

Graphs show data in a direct way that is easy to read and understand. There are many different kinds of graphs. Different graphs are better for different kinds of data. Read on to find out about the types of graphs in math, as well as the key parts of a graph.

Bar chart

A bar chart has a horizontal axis (横轴) and a vertical axis(竖轴). It has a title that explains what it shows, and different bars are used to show different amounts. There's a number line along the vertical axis and labels(标签) along the horizontal axis, labeling the data.

Pie chart

A pie chart helps organize and show data as a percentage of a whole. True to the name, it looks a bit like a pie and uses a circle to show the whole. Pieces of that circle, or "pie", stand for the different things. The different pieces of the pie are different sizes depending on how much of the whole pie they show. Each piece is labeled to show what it means.

Line graph

Line graphs are used to show changes to numbers over time. They show what we call continuous data. The vertical axis explains the data being shown. We mark data on a line graph. The different data points are then joined up with straight lines, so we can look at the trend(趋势) it shows.

Flow chart

A flow chart shows the different steps in something using boxes and arrows(箭头). It can often have many different directions and different paths you can take using the information it asks for. Flow charts can be great for explaining a huge process by breaking it down into different steps.

 阅读下列短文,从下面每小题的 A 、B 、C 、D 四个选项中选择最佳 选项。

Foreign travelers took a photo after practising Tai Chi at the Temple of Heaven on July 9.

The 144-hour visa-free policy(过境免签政策) helps foreigners know the true China. 

You might have heard"city bcity"(city or not city). A foreign blogger said this when he visited the Great Wall. It soon became popular. People now use it to ask if a place has the fashionable feel of a big city. There are many more foreign travelers like him in China. This is partly thanks to China's 144-hour visa-free transit policy. 

A popular policy

The visa-free transit policy means foreigners can visit China without getting a visa. It started in 2013. At first, it only worked in seven big cities. At that time, people could stay for only 72 hours. But now, people can stay in China for up to 144 hours. The policy works in more places now. People from 54 countries enjoy this policy. 

The policy helps draw(吸引)more travelers to China. This year, more foreigners visited China through visa-free policies. 

Seeing the real China

Reporters in the West often write untrue news stories about China. They call China"unsafe and underdeveloped". But now, this policy lets more people sec the real China. 

"This is the whole reason why we decided to come to this country—we wanted to see what it's like for ourselves, "Luke, an Irish travel blogger, said. He thinks Chengdu is really"good, beautiful and modern" . 

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