Question

It seems to be strange that there is a blind spot in the eye. Here is an interesting experiment (实验) that can make something disappear 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" is on the left and "R" on the right. First, hold the card about 80 cm away and you can 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, the letter will be seen again. Now do the same experiment with your left eye closed; you'll find the letter "R" disappearing.

Why do the letters disappear? It is because there is a blind spot in the eye. When the image (影像) of the letter falls on the blind spot, it won’t be seen. That’s why one of the letters disappears.

1.The writer of the passage thinks that _______ there is a blind spot in the eye.

A. few people know B. no one knows

C. most people know D. all the people know

2.The word "disappear" in the first paragraph means _______ .

A.消亡 B.丢失 C.消失 D.丧失

3.You fail to see the letter "L" in the experiment because _______ .

A. your eyes are poor

B. you move it close to your eye

C. its image falls on the blind spot

D. your left eye is not open

4.In which order should the experiment be done?

a. Hold the card.

b. Move the cards nearer

c. Close your right eye.

d. Write two English letters on the cards.

e. Look at the letter "R".

f. Make cards.

A. d. f. a. b. c. e. B. a. c. f. d. e. b.

C. f. a. d. c. b. e. D. f. d. a. c. e. b.

5.This passage mainly(主要)tells us _______ .

A. there is a blind spot in the eye

B. an interesting experiment

C. where the blind spot is

D. how to find the blind spot

Answer 1

1.A

2.C

3.C

4.D

5.A

【解析】

试题分析：这篇短文作者通过一个实验，告诉了我们在我们的眼睛上有一个盲点，并重点解释了造成这一现象的原因。

1.根据第一段It seems to be strange to you that there is a blind spot (盲点)on the eyes.描述，可知很少有人知道眼睛上劝盲点。故选A。

2.联系下文第二段对实验的描述，可知此处指的是让某物消失，根据题意，故选C。

3.根据最后一段When the image (影像) of the letter falls on the blind spot, it won’t be seen.描述，当影像落在盲点上，我们将看不到这个影像。根据题意，故选C。

4.根据短文第二段描述，根据题意，故选D。

5.It seems to be strange that there is a blind spot in the eye. 这篇短文主要告诉了我们在我们的眼睛上有一个盲点，根据题意，故选A。

考点：科普环保类短文阅读。