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, Lon 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' 11 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.The word "disappear" in the passage means_______ in Chinese.

A. 驱散 B．消散 C．消失 D. 遗失

3.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

4.In which order(顺序)should you do the experiment?

①Hold 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

5.The passage mainly 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.C

3.B

4.D

5.D

【解析】

试题分析：这似乎是奇怪的你有一个盲点的眼睛,这是一个有趣的实验,可以让东西消失,当一只眼睛是睁着的。做一个卡片大小的明信片,写两个英文字母L和R,R朗左边和右边。首先,把卡大约80厘米远,你会看到信件。然后闭上你的右眼看字母R只有你的左眼。现在,当你移动卡慢慢地向你,你会发现字母L消失。但是如果你移动卡靠近你的脸,这封信将会出现。现在闭着左眼做相同的实验,你会发现字母R消失。为什么字母消失?这是因为有一个盲点。当影像的盲点,它不会被看到。这就是为什么这两个字母就消失了。

1.短文中作者认为多少人知道眼睛有盲点？结合短文提供的信息，人们现实生活中很少有人知道这一现象的存在。故选：A

2.单词的汉语意思是什么？分析原文：Here is an interesting experiment(实验)that can make something disappear, when one eye is open.句意：这是一个有趣的实验,可以让东西消失,当一只眼睛是睁着的。故选：C

3.你实验中你为什么没有看到字母L?分析原文：as you move the card slowly towards you, you' 11 find the letter L disappearing.句意：当你移动卡慢慢地向你,你会发现字母L消失。故选：B

4.在实验中的正确排序是什么？联系短文的第二自然段发现，第四项的顺序是正确的。故选：D

5.主要告诉我们什么？通读全文中得知重点描述在我们的眼睛中有盲点。故选：D

考点：科普类阅读。