| 阅读理解。 |
| It seems to be strange to you there is a blind spot on the eyes. Here is an interesting experiment 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. most people know D. all the people know |
| 2. "a blind spot" in the passage means _____ in Chinese. |
| A.污点 B. 消散 C. 盲点 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. you move it close to your eye D. your left eye is not open |
| 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 (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 |