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【简答题】
用波长λ=500nm的单色平行光垂直照射到每厘米1000条缝的衍射光栅上，光栅距屏100cm，求第二级光谱线与中央明条纹的距离．
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举一反三
【单选题】Young Corp. hired Luisa as a sales manager for six months at a salary of $5,000 per month plus 6% of sales. Which of the following statements is correct?
A.
The agreement between Young and Luisa formed an agency coupled with an interest.
B.
Luisa is obligated to act solely in Young's interest in matters concerning Young's business
C.
Young does not have the power to dismiss Luisa during the six- month period without cause
D.
The agreement between Young and Luisa is not enforceable unless it is in writing
【简答题】How come Old Behrman caught pneumonia too?
【单选题】George was introduced to ______ activities at a young age, when he was hired to act as a lookout for drugdealers.
A.
illegal
B.
lawful
C.
faithful
D.
peaceful
【简答题】The young man likes Lu Xun’s ______(作品).
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