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【单选题】
Handguns are freely available ____ the open market.A.
on
B.
at
C.
in
D.
for
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【简答题】幼儿健康的标志及具体表现? 2.影响幼儿健康的因素是什么?
【单选题】The number of refereeing errors in the experimental matches was ________
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard match
【单选题】The number of refereeing errors in the experimental matches was ______.
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard march
【简答题】用白光垂直入射到间距为d=0.25mm的双缝上，距离缝1.0m处放置屏幕。求第二级干涉条纹中紫光和红光极大点的间距（白光的波长范围是400nm～760nm）。
【单选题】A(n) (__) matches the process with each entry in the TLB.
A.
address-space identifier
B.
process id
C.
stack
D.
page number
【单选题】用白光垂直入射到间距为d=0.25mm的双缝上,距离缝1.0m处放置屏幕,则第二级干涉条纹中紫光和红光极大点的间距为( )。(白光的波长范围是400—760nm)
A.
2.88x10-3m
B.
2.88x10-4m
C.
5.76x10-3m
D.
5.76x10-4m
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