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【单选题】
对于牛顿环,其球面镜的定点与平面镜的相接触,当用单色光垂直入射时产生等厚干涉圆环,如果观察其反射光的干涉条纹,则干涉图样中心 [ ]A.
是暗纹
B.
是亮纹
C.
不确定
D.
既不是亮纹也不是暗纹
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】以需求函数q=a-bp为例，试分析为什么在需求曲线缺乏弹性的部分经营不可能产生最大利润。
【简答题】以具体作品为例，分析其中的景、情关系。
【单选题】We've interviewed several candidates but haven't found ______ fit for the job.
A.
one
B.
ones
C.
it
D.
them
【简答题】以短信业务为例，分析其产品解决方案。
【单选题】We interviewed the mountaineers with their strongest aspiration, in respect.
A.
stretchy
B.
revamped
C.
reverent
D.
affected
E.
overt
【简答题】Thanksgiving is an important festival in North America. We interviewed several students from the US and Canada. Here is what they have told us about their Thanksgiving experiences. Josie from New York...
【单选题】We interviewed each _____member of the community.
A.
individual
B.
individualism
C.
individually
D.
personal
【多选题】Certain physical reactions happen automatically while we are interviewed or make a presentation, for instance, __________ .
A.
our voice might tremble
B.
we might have some sweaty palms
C.
our heartbeat will be accelerating
D.
we may have butterflies in our stomach
【简答题】以股份公司为例说明账户按会计要素如何分类。
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