题目内容
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。
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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（ ）
快递营运网络的构成包括
收派线路优化原则主要包括（ ）
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