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【多选题】
一束平行的自然光,以 60° 角入射到平玻璃表面上.若反射光束是完全偏振的,则A.
透射光束的折射角是 60° ；
B.
透射光束的折射角是 30° ；
C.
透射光束的折射角不能确定；
D.
玻璃的折射率为 1.73 ．
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皮皮学刷刷变学霸
举一反三
【单选题】Which law explains the behavior of hydraulic fluids under pressure?
A.
Charles's law
B.
Newtons law
C.
Pascal's law
D.
none of the above
【单选题】According to the news, which of the following groups reacts negatively to the new law?
A.
Television producers.
B.
Hotel owners.
C.
Medical workers.
D.
Hospital management.
【判断题】There is the law of diminishing returns which explains the changes in MC,ATC and AVC.
A.
正确
B.
错误
【多选题】发现现场微量物证主要应从以下()方面着手
A.
现场进出口
B.
犯罪分子在现场活动的区域
C.
犯罪分子来去路线及交通工具
D.
犯罪嫌疑人身上
E.
犯罪嫌疑人停留过的场所
【单选题】The law of over－learning explains why cramming (突击学习) for an examination, though it may result in a passing grade, is not a ________ way to learn a school course. [ ]
A.
convenient
B.
demanding
C.
satisfactory
D.
swift
【单选题】As Prof. Hoffmann explains, the Congress makes or creates law, the Executive Branch enforces the law, and the Judicial Branch of government is supposed to____________.
A.
protect the law
B.
maintain the law
C.
interpret the law
D.
repair the law
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