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【单选题】
理想光学系统的衍射分辨率的定义为A.
两个衍射像点之间所能分辨的最小间隔
B.
子午面两条子午光线对的交点到理想像平面的距离
C.
弧矢面两条弧矢光线对的交点到理想像平面的距离
D.
弧矢面两条弧矢光线对的交点到主光线的距离
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举一反三
【简答题】对于施工周转材料，能计入材料定额消耗量的是（ ）。
【单选题】What are the main features of Vault III?
A.
It is the oldest building resembling a galley.
B.
It is likely the headquarters of the troops of Vault I and Vault II.
C.
It is the largest one among the three vaults.
D.
It has a 1. 95-meter-high robust marshal as the commander.
【简答题】Carl: Hi. My name's Carl. Nice to meet you. Pancho: Nice to meet you, too. My name is Francisco. Carl: What? Pancho: Francisco, but all my friends and family back in Peru call me Pancho. Carl: Okay, P...
【单选题】听力原文： Man: My secretary tells me that you'd like to know something about mechanical engineering. What I can do is give you some idea of the variety of specialties within the field. Woman: I'd apprecia...
A.
She is planning to buy a refrigerator.
B.
She is interested in fashion design.
C.
She wanted to know something about a subject.
D.
She asked the man to help her find a job.
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