问题
选择题
| 某同学用某种单色光做双缝干涉实验时，发现条纹太密难以测量，可以采用的改善办法是（ ） A．增大双缝间距 B．增大双缝到屏的距离 C．增大双缝到单缝的距离 D．改用波长较短的光（如紫光）作为入射光 |
答案
答案：B
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| 某同学用某种单色光做双缝干涉实验时，发现条纹太密难以测量，可以采用的改善办法是（ ） A．增大双缝间距 B．增大双缝到屏的距离 C．增大双缝到单缝的距离 D．改用波长较短的光（如紫光）作为入射光 |
答案：B
| 阅读理解 | ||||||||||||||||
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| 根据材料内容，选择最佳选项。 | ||||||||||||||||
| 1. The Beijing Tour will last ______. | ||||||||||||||||
| A. four days B. five days C. a week D. eight days | ||||||||||||||||
| 2. If you take the "4-Day Beautiful Guilin Tour", you will be able to ______. | ||||||||||||||||
| A. visit the Great Wall B. enjoy the river life C. relax on the beach D. experience the city life | ||||||||||||||||
| 3. If you take the "______", you will be able to experience different cultures. | ||||||||||||||||
| A. 4-Day Beijing Tour B. 8-Day Colorful Yunnan Tour C. 4-Day Beautiful Guilin Tour D. 5-Day Sanya Tour | ||||||||||||||||
| 4. If you want to take a trip to the beach, you should call ______. | ||||||||||||||||
| A. 800-810-6562 B. 800-820-6222 C. 800-820-8188 D. 800-810-5222 | ||||||||||||||||
| 5. If Mrs Li take her two daughters for the "5-Day Sanya Tour", she needs to pay ______. | ||||||||||||||||
| A. $1,695 B. $1,707 C. $1,644 D. $2,007 |