问题
填空题
太阳光通过了三棱镜后，若用一个白屏来承接，则白屏上形成一条彩色的光带．这个现象说明白光是由______组成的．
答案
太阳光是一种复色光，所以我们可以通过三棱镜将其分解为七种颜色的色光，即该现象称为光的色散；该现象进一步证实了太阳光是由红、橙、黄、绿、蓝、靛、紫这七种颜色的色光组成的．
故答案是：七色光（或多种颜色，或具体的七种颜色）．
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太阳光通过了三棱镜后，若用一个白屏来承接，则白屏上形成一条彩色的光带．这个现象说明白光是由______组成的．
太阳光是一种复色光，所以我们可以通过三棱镜将其分解为七种颜色的色光，即该现象称为光的色散；该现象进一步证实了太阳光是由红、橙、黄、绿、蓝、靛、紫这七种颜色的色光组成的．
故答案是：七色光（或多种颜色，或具体的七种颜色）．
| 完形填空。 |
| Molly is a little girl. She's a nice girl. Her father, Mr Black, is a doctor. He isn't 1 today. So he takes Molly to a 2 shop. Woman: Can I help you, please? Black: Yes. Well, what would you like, Molly? Molly: A 3 , Dad. Black: Which one, my little girl? Molly: The red one, beside the brown dog. Black: Oh, that's too 4 . What about a small one? Molly: All right, then. Can I 5 a cat, Dad? Black: Certainly…How much, please? Woman: The robot is fifty yuan, and the cat is twenty yuan. Black: Here's seventy yuan. Woman: Thanks. Molly: Dad, can you buy me a 6 ? Black: Oh, there isn't 7 here. Let's go to the 8 shop. Molly: But I'm very 9 now. I want something to eat. Black: 10 let's go to the food shop first. |
| ( )1. A. at school ( )2. A. toy ( )3. A. cat ( )4. A. small ( )5. A. make ( )6. A. cat ( )7. A. much ( )8. A. clothes ( )9. A. thirsty ( )10. A. For | B. at work B. fruit B. plane B. big B. borrow B. dog B. many B. toy B. hungry B. And | C. at home C. food C. dog C. long C. try C. blouse C. any C. fruit C. worried C. But | D. in the shop D. clothes D. robot D. short D. have D. boat D. some D. food D. careful D. Then |