中考英语复习精品资料 阅读练习17

中考英语复习精品资料阅读练习17It 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, youll 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, youll 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 wont 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. most people know D. all the people know2. 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 spotD. your left eye is not open C. you move it close to your eye4. In which order (顺序) should you do the experiment?Hold the card Move the card nearer Close your right eye Write two English letters Look at the letter R Make a cardA. B. C. D. 5. 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 blind spot on the eye【答案与解析】这篇科普说明文通过一个简易的小实验，证实了人的眼睛里有一个盲点。当外界物体的影像落在盲点上时，人就看不见该物体了。1. A。仔细品读文章首句的意思，可知答案只能是A。2. C。“But if you move the card nearer to your face, the letter will be seen again”，由这几个句子的意思可知字母L在眼睛中消失了。注意消失和消散的区别。3. B。答案在“When the image of the letter falls on the blind spot, it wont be seen.”中。4. D。根据第二段的意思可知，此实验的顺序是：先制作一张卡片在上面写上两个字母拿起卡片闭上右