题目内容

当自然光以布儒斯特角入射到两种各向同性透明介质的分界面时:

A. 反射光是线偏振光,折射光也是线偏振光;
B. 反射光是线偏振光,折射光是部分线偏振光;
C. 反射光部分是偏振光,折射光是线偏振光;
D. 反射光是部分偏振光,折射光也是部分偏振光。

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自然光从空气以60度角入射到折射率为n的介质表面上,反射光是振动面垂直于入射面的线偏振光,则该介质的折射n的值是:

A. 1.732
B. 1.50
C. 1.414
D. 1.33

平面偏振光(光强为I0)通过尼科耳后,出射方向e光强度为I0cos^2θ。

A. 对
B. 错

Directions: Complete the following passage with the words and expressions from Reading 1.On May 13, 2012, Filipaj, a (1)from Yugoslavia, got a bachelor's degree from Columbia University.When his hometown became a killing field in 1992 with civil war, Filipaj (2)___________ to New York and worked as a (3)___________ in Columbia University. He overcame all the difficulties he (4) _____________ on his way to be the IVY League graduate. The (5)student and worker would go to the class in the morning and work a 2:30-11 p.m. (6)_________ before heading home to study. When talking about his hardships, he was (7)___________ without the slightest (8)_____________ and he even cheerfully described (9)____________ with surprised younger students.His (10)___________ is to get a master's degree, even a PhD. He hopes to become a teacher.

目前我国快递企业的快递网络运作模式主要包括( )

A. 直营模式
B. 加盟代理模式
C. 外包模式
D. 联盟模式

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