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【单选题】
一为I0的自然光,相继通过三个偏振片P1、P2和P3后,出的光强为I0/8 。已知P1和P3的偏振化方向相互垂直,若以入线为轴,旋转P2 ,要使出的光强为零,最少要转过的角度是A.
30°
B.
45°
C.
60°
D.
90°
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【单选题】What did not the news mention about?
A.
Gunman Jonson was shot dead by police.
B.
Michael Bloomberg disproves the holding of gun.
C.
The student Patrick says that within 7 days there were 3 gun shootings happened in New York.
D.
Vincent Thomas surprised that the prominent building like Empire Building should have gun fires.
【简答题】a. The minister _______ him to leave as soon as possible. b. They employed me as an _______. c. It was ________ for you not to mention that. d. What _______does the author give to college students.
【简答题】Michael Jordan told me not to mention this until the season was over and I promised him at that time. Now I think it’s time. Early last season, I wrote a column about an act of kindness I had seen Jor...
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