题目内容

创业计划的正文最好以展示结论、结果为主

A. 对
B. 错

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1. 在双缝干涉实验中，光的波长为600 nm (1 nm＝10－9 m)，双缝间距为2 mm，双缝与屏的间距为300 cm．在屏上形成的干涉图样的明条纹间距为

A. 0.45 mm
B. 0.9 mm．
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D. 3.1 mm

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It is our goal to make our products availableevery part of the world.

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