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    精英家教网 > 初中英语 > 题目详情
    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(消失) when one eye is open.
    Make a card which is as big as a postcard, and write two English letters L and R on it. Write L on the left and R on the right. First, hold the card about 80 cm(厘米) 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.
    小题1: Where should we write the two letters?
    小题2:Which letter should be written on the left?
    小题3:Which eye do you close when R disappear?
    小题4:What will happen if the image (影像) of the letter falls on the blind spot?
    小题5:.Do all people know that there is a blind spot (盲点)on their eyes?

    小题1:On a card
    小题2:L
    小题3:Left eye.
    小题4:It won’t be seen.
    小题5:No.

    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。作者通过介绍试验，证明了这一现象。
    小题1:根据第二段Make a card which is as big as a postcard, and write two English letters L and R on it.可知把两个字母写在了卡片上，故填On a card
    小题2:根据第二段Write L on the left and R on the right.故填L
    小题3:根据第二段可知当你闭上右眼，字母L就会消失，所以如果你闭上左眼，字母R就会消失，故填Left eye.
    小题4:根据When the image (影像) of the letter falls on the blind spot, it won’t be seen.故填 It won’t be seen.
    小题5:根据第一段有盲点对于你来说是奇怪的可知不是所有的人都知道这件事，故回答No.
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