摘要: We don’t have to SARS.

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The London Olympic Games are coming soon. This summer, Chinese sports fans will be able to watch the exciting games in 3-D on CCTV.

When you watch 3-D movies or TV, you have to wear a special pair of glasses. The 3-D glasses make the people and the things on the screen look like they are in the room with you.

3-D, means having three *dimensions: *width, height and *depth. 3-D technology is based on the way the human brain and eye work. Because the *pupils of a person’s eyes are about 6.5cm apart, when we look at something, each eye sees it from different *angle. Our eyes send the two pictures to our brain, and the brain puts them together. The small difference between the picture from the right eye and the picture from the left eye make us see depth.

While watching 2-D films, we don’t have to wear the special glasses. We see the pictures in two dimensions, each eye get the same information. This is because there is only one way of watching it.

So the aim of 3-D technology is to get a different picture into each eye of the person. It uses two film *projectors. One *projects a left eye picture and the other projects a right eye picture. When we are in the cinema, we can see different pictures in each eye at the same time with the help of the 3-D glasses.

While watching 3-D films, we feel that we are actually in the same environment as the things we are watching. However, some people are against watching 3-D films. One of the reasons is the 3-D glasses makes the screen of the film or TV look darker. It is bad for eyes. What’s more, people with eye problems may get headaches if they spend too much time watching 3-D movies, because their brains need to work harder to “read” the pictures.  

1.Paragraph 3 mainly tells us __________.

A.how we see things in 3-D                  B.how we watch the Olympic Games

C.how 3-D films are made                   D.where we watch 3-D films or TV

2.When we watch a 2-D film, each of our eyes get ________ information.

A.no               B.different          C.dark             D.the same

3.Which is the following is right according to the passage?

A.We don’t have to wear 3-D glasses if we watch games in 3-D on TV.

B.The 3-D technology is based on the way the human ear and eye work.

C.All the people can have fun watching 3-D movies or TV for a long time.

D.3-D glasses make us see different pictures in each eye at the same time.

4.Why are some people against watching 3-D films? Because ____________.

A.they make them more excited or sadder

B.3-D glasses make the screen look darker

C.3-D films make all people get headaches

D.they dislike watching the Olympic Games

 

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Thousands of years ago, people didn’t know that the Earth moved. They thought the sun really did move across the sky. The Greek god Helios was said to drive the sun around the sky with his chariot(战车). But now, these ideas have all changed. Nowadays, it is the sun that drives our “chariot” around the sky.

So what does all this mean? Well, quite simply, there is now a plane (or “chariot”) that is powered by the sun. It has special parts in its wings. These parts absorb power from the sun. They absorb so much power that they can carry on flying at night. In the Greek myths(希腊神话), Helios had to take a break at night. It seems we’re finally even more efficient than the gods themselves.

This plane is called Solar Impulse (“太阳驱动”号). It will fly across the US in May. This is very important for the future of the world.

So why is solar energy so good for us? Well, other kinds of energy cause a few problems. If you live in China, you’ve probably noticed the pollution. This is caused by burning coal or gas to make energy. The heat and chemicals(化学制品)from this make things work. But if we use the heat from the sun, we don’t have to burn anything, and there’s no pollution.

Solar energy is not all there yet. It needs to be improved. But the best thing about it is that, unlike coal and gas, it doesn’t run out. Solar Impulse could keep flying forever. Well, actually, the sun will run out too, one day, but not for another 5 billion years. That’s a pretty long flight.

1.What does “chariot” really refer to in the last sentence of Paragraph 1?

A.The Earth.         B.The Greek god.     C.Solar Impulse.      D.Birds.

2.Which of the following is TRUE of Solar Impulse?

A.It can only fly at night.                    B.It has already flown across the US.

C.It is powered by the sun.                  D.It needs gas to work.

3.In the passage, what is mentioned as the cause of pollution in China?

A.Overpopulation.                        B.Burning coal or gas.

C.Using solar energy.                      D.Heavy traffic.

4.What does the writer mean by “That’s a pretty long flight”?

A.It takes a lot of time to get Solar Impulse going.

B.Solar Impulse moves very slowly.

C.Solar Impulse will be in use for a long time.

D.Solar Impulse has a long way to go to take the place of the sun.

5.The passage is most probably taken from___________.

A.a Greek myth      B.a science fiction     C.a story-book       D.a science magazine

 

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