Question

It seems to be strange to you there is a blind spot(盲点)on the eyes，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 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，the letter will be seen 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 eye．When the image(影像)of the letter falls on the blind spot，it won’t be seen．That is why either of the letters

disappears．

1.The writer of the passage thinks that __________ there is a blind spot on the eye．

A．few people know B．no one knows

C．only you 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 the card ② Move the card nearer

③ Close your right eye ④ write two English letter

⑤ Look at the letter R ⑥ Make a card

A．④⑥①②③⑤ B．①③⑥④⑤②

C．⑥①④③②⑤ D．⑥④①③⑤②

4.．The passage mainly(主要)tells us_________．

A．how to find the blind spot

B．an interesting experiment

C．where the blind spot is

D．there is a blind spot on the eyes．

 

Answer 1

1.A

2.B

3.D

4.D

【解析】

试题分析：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.

2.

3.

4.

考点：科普类短文阅读。