问题
不定项选择
| 不定项选择 |
| 某同学自己动手利用如图所示器材观察光的干涉现象，其中，A为单缝屏，B为双缝屏，C为像屏。当他用一束阳光照射到A上时，屏C上并没有出现干涉条纹，他移走B后，C上出现一窄亮斑。分析实验失败的原因，最大的可能性是（ ） |
|
A．单缝S太窄 B．单缝S太宽 C．S到S1与到S2的距离不等 D．阳光不能作为光源 |
答案
答案：B
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| 不定项选择 |
| 某同学自己动手利用如图所示器材观察光的干涉现象，其中，A为单缝屏，B为双缝屏，C为像屏。当他用一束阳光照射到A上时，屏C上并没有出现干涉条纹，他移走B后，C上出现一窄亮斑。分析实验失败的原因，最大的可能性是（ ） |
|
A．单缝S太窄 B．单缝S太宽 C．S到S1与到S2的距离不等 D．阳光不能作为光源 |
答案：B
| 用方框中所给词的适当形式填空。 | |
2. We have a dare at 7: 00 tomorrow morning. 3. There are thirteen more trains from Changchun Spring Festival. 4. I m very about our teacher's health. 5. There are too many people in the hall. 6. It is for us to remember teamwork forever. 7. The pet dog must to Lily. 8. In my dream, I was swimming in an of paper. 9. Linda doesn't have any time. We have to ask Tina her. 10. Please hurry up, or we can't the first bus. |