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【多选题】
一定波长光入射到光栅上,其衍射图样中各级主的相对光强是由哪些因素决定的?A.
光栅常数
B.
光栅刻线总条纹数
C.
每个透光缝的宽度
D.
衍射光的衍射角
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举一反三
【单选题】Mr. Green and Mr. King have taught English at Beijing Sunshine Secondary School _____ they came to China two years ago. [ ]
A.
since
B.
as
C.
for
D.
until
【单选题】Which of the following best expresses the views of Mr. Fukuyama of George Mason University?
A.
Working women should be on the pill.
B.
More women should be in the workforce.
C.
Female liberties should be restrained through compulsory means.
D.
Women's participation in the workforce may contribute to crime and disorder.
【单选题】How did Mr. Mason kbnow their wedding?
A.
He was told by Jane.
B.
He was told by Jane's uncle.
C.
He got the news from the local newspaper.
D.
He learnt it from Mrs.Fairfax.
【简答题】阅读下面文章，完成句子。 Mr. Mason is standing in front of a car. He is looking at it. It is a beautiful car and it is very big. Mr. Mason likes big cars. A policeman is standing behind Mr. Mason. He is looking a...
【单选题】Mr. Mason, who holds the office of chairman, has _____ heavy a work load that it is difficult for him to travel.
A.
such
B.
so
C.
quite
D.
much
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