题目内容

_______ apple a day keeps_______ doctor away.

A. An,a B. An, the C. The, a D. A, the

B

【解析】

试题解析:句意:这是英语的一句俗语,表面意思是一日一苹果,医生远离我。doctor在这里特指医生,故用定冠词the;apple中的a发音是//,属于元音音素,故前用an;day中的d发音是/d/,属辅音音素,故选B.

【点评】当字母发的音是元音音素,用不定冠词an, 而当发的音是辅音音素属辅音音素,用不定冠词a;特指某(些)人或某(些)物,这是定冠词的基本用法。; 此为高频考点。

【考点】考查冠词的用法。

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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.

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