Question

When you watch 3D movies or TV，you have to wear a special pair of glasses．The 3D glasses make the images from the screen look like they are there in the room with you．

Three-dimensional，or 3D，means having three dimensions（维度） : width，height and depth．3D technology（技术） is based on the way the human brain（大脑） and eyes work．Because the pupils of a person's eyes are about 6．5era apart（分开），when we look at something，each eye sees it from a different angle（角度）．Our eyes send the two images to our brain，and the brain puts them together．The small difference between the image from the right eye and the image from the left eye allows us to see depth．

When we view pictures and television in two dimensions，each eye gets the same information．That is because the image has no real depth，and there is only one of viewing it．So the goal of 3D technology is to get a different image into each of the viewer．It uses two film projectors．One projects a left eye image and the other projects a right image．The 3D glasses allow us to see a different image in each eye．

While watching 3D films，we feel that we are in the same environment as the things we're watching．However，it also has its disadvantages．The 3D glasses work by controlling the amount of light that reaches the eyes．It makes the screen look darker．What's more，people with eye problems may get headaches if they spend too much time watching 3D movies，because their brains need to work harder to "read" the images．

1.According to the passage，we can see 3D TV with the help of ____．

A．the exciting games B．the special glasses

C．the dark screen D．the image in the room

2.The second paragraph mainly tells us ____．

A．how we see things in 3D

B．how 3D films are made

C．what the human brain does for our eyes

D．how different images get into the brain

3.The underlined word "pupils" in the passage means____ in Chinese．

A．学生 B．视线 C．睫毛 D．瞳孔

4.Which of the following is TRUE?

A．3D glasses make the screen look brighter．

B．People with eye problems can't see 3D films．

C．A 3D film needs making by two film projectors．

D．3D glasses held people get the same image in each eye．

Answer 1

1.B

2.A

3.D

4.C

【解析】

试题分析：短文大意：该文主要介绍了3D电影，以及3D电影技术的科学原理。3D电影看起来是非常令人兴奋的，越来越多的3D电影进入电影院。当我们看一个物体的时候，每一个眼睛看不同的角度，然后大脑把他们放到一起。有些有眼睛问题的人看3D电影会感到头晕或头痛。

1.短文第一句When you watch 3D movies or TV，you have to wear a special pair of glasses．可知人们观看3D电影或电视时必须戴上一个特殊的眼镜。所以该选B。

2.段落大意题。细读短文第二段可知人们是如何从三位角度看东西的，所以该选A。

3. a person's eyes以及下文描述可知划线词意为’瞳孔”.所以该选D。

4.第三段中It uses two film projectors．One projects a left eye image and the other projects a right image．可知制作3D电影使用了两个电影放映机。所以该选C。

考点：科普类阅读。