题目内容

【题目】It seems to be strange to you that there is a blind spot (盲点) on the eyes. Here is an interesting experiment (实验) that can make something disappear (消失), when one eye is open.

Make a card about the size of a postcard and write two English letters L and R on it, L on the left and R on the right. First, hold the card about 80 cm away and you see both the letters. Then close your right eye and look at the letter R only with your left eye. And now, as you move the card slowly towards you, you’ll find the letter L disappearing. But if you move the card nearer to your face, you can see the letter again. Now do the same experiment with your left eye closed, you’ll find the letter R disappearing.

Why does the letter disappear? It is because there is a blind spot on the eyes. When the image (影像) of the letter falls on the blind spot, you can’t see it. That is why either of the letters disappears.

【1】The writer of the passage thinks that ______________there is a blind spot on the eyes.

A. few people know B. no one knows

C. most people know D. all the people know

【2】You fail to see the letter L in the experiment because ______________.

A. your eyes are poor

B. its image falls on the blind spot

C. your left eye is not open

D. you move it close to your eye

【3】In which order (顺序) should you do the experiment?

①Hold /span>the card

②Move the card nearer

③Close your right eye

④Write two English letters

⑤Look at the letter R ⑥Make a card

A. ④⑥①②③⑤ B. ①③⑥④⑤②

C. ⑥①④③②⑤ D. ⑥④①③⑤②

【4】The passage mainly (主要) tells us ______________.

A. the blind spot can move

B. an interesting experiment

C. where the blind spot is

D. there is a blind spot on the eyes

【答案】

【1】A

【2】B

【3】D

【4】D

【解析】

这篇短文主要介绍了人的眼睛上有个盲点。这件事很少有人知道。作者通过一个试验，证明了这一现象。

【1】A推理判断题。根据短文第一段 It seems to be strange to you there is a blind spot on the eyes你眼睛上有一个盲点对于你来说这似乎是奇怪的，可知，很多人是不知道眼睛有盲点这件事。故选A。

【2】B细节理解题。根据第三段When the image(影像)of the letter falls on the blind spot，it won’t be seen描述，可知当字母的影像落在盲点，就不能被看到。故选B。

【3】D归纳理解题。根据第二段描述的实验步骤，故选D。

【4】D归纳理解题。根据短文的主要内容可知作者用过试验证明了盲点的存在，故选D。

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