问题
选择题
如图将一束太阳光投射到玻璃三棱镜上，在棱镜后侧光屏上的AB范围内观察到不同颜色的光，则
A．A处应是紫光
B．只有AB之间有光
C．将涂有荧光物质纸条放到AB范围B处的外侧，荧光物质发光
D．将温度计放到AB范围A处的外侧，温度计示数不会娈化
答案
答案：C
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如图将一束太阳光投射到玻璃三棱镜上，在棱镜后侧光屏上的AB范围内观察到不同颜色的光，则
A．A处应是紫光
B．只有AB之间有光
C．将涂有荧光物质纸条放到AB范围B处的外侧，荧光物质发光
D．将温度计放到AB范围A处的外侧，温度计示数不会娈化
答案：C
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| One summer evening, a 1 boy was trying to hit (击中) a bottle with a slingshot (弹弓). The bottle was about 7 to 8 metres 2 . The boy tried many times but still couldn't hit it. His mother just kept 3 him small stones. A girl walked by. She watched the boy for some time and said to the mother, "Let me show 4 how to shoot." "No, thank you," said the mother, "he is blind (失明的)." The girl was 5 and asked, "How can he hit the bottle then?" "I tell him he can do it," said the mother, " 6 he tries hard enough." The little boy tried again and again. The mother always told him that he was doing 7 . The boy 8 more confident (自信). After a long time, it 9 dark. The girl said goodbye to the mother and son. When she turned to leave, she heard a stone hit the bottle. The little boy 10 hit it! With confidence and patience, nothing is impossible. |
| ( )1. A. 10-years-old ( )2. A. long ( )3. A. passing ( )4. A. you ( )5. A. surprise ( )6. A. before ( )7. A. well ( )8. A. sounded ( )9. A. turn ( )10. A. hardly | B. 10 years old B. away B. throwing B. it B. surprised B. if B. better B. turned B. got B. finally | C. 10-year-old C. high C. putting C. him C. surprising C. until C. best C. became C. grows C. almost |