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） or the letter falls on the blind spot, it won't be seen. That is why either of the letters disappears.
【小题1】The writer of the passage thinks that___________ there is a blind spot on the eye.
| A．no one knows | B．few people know |
| C．most people know | D．all the people know |
| A．遗失 | B．驱散 | C．消散 | D．消失 |
| A．Hold the card | B．Move the card nearer |
| C．Write two English letters | D．Make a card |
| A．there is blind spot on the eyes | B．a boring experiment |
| C．an interesting story | D．when to find the blind spot |
【小题1】B
【小题2】D
【小题3】C
【小题4】D
【小题5】A
解析试题分析：这篇短文主要介绍了作者通过一个实验，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。
【小题1】细节理解题。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有盲点。故选B。
【小题2】词义猜测题。联系下文描述，可知此处指的是让某物消失，故选C。
【小题3】细节理解题。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，可知选C。
【小题4】细节理解题。根据第二段描述Make a card about the size of a postcard and write two English letters L and R on it,可知试验的第一步是制作一个卡片，故选D
【小题5】归纳理解题。这篇短文主要告诉了我们在我们的眼睛上有一个盲点，故选A。
考点：科普类短文阅读。
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