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【简答题】
有一测量显微镜，放大率Γ=-100 x ，物体位于物镜前15mm处；若物镜放大倍率β=-10 x ，数值孔径NA=0.2，物镜的口径为10mm，试求： (1)显微镜的分辨率。 (2)物镜和目镜的焦距。 (3)不发生渐晕时的视场大小2y。 (4)分划板的大小和位置。 (5)孔径光阑的大小和位置。 (6)出瞳和出瞳距。 (7)画出系统的光路图。
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【简答题】12 New Item Two Questions 3 to 4 will be based on the following news item. 3. A) To reduce the number of pilots on duty. B) To pr pilots from working overtime. C) To ensure an adequate amount of ...
【单选题】What does the man think of the woman's plan?
A.
He can help her find the name.
B.
She had better get two poetry books instead.
C.
She might be wasting her time.
【单选题】根据《麻醉药品和精神药品管理条例》,运输麻醉药品和第一类精神药品的运输证明的有效期为( )。
A.
3年
B.
1年
C.
不少于5年
D.
药品有效期满之日起不少于5年
【简答题】She had c_____ the idea of a series of novels. (think of an idea or a plan and work out how it can be done)
【单选题】The argument regarding the significance of contanment would be mostweakened, if E) the author of the journal article had identified himself
A.
a military alliance among European powers had been proposed before WWII
B.
the economic aid offered under the Marshall Plan was more than was needed
C.
the foreign policy journal referred to had a wider circulation
D.
the concept had been adopted by other countries
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