问答题

我的一家（不少于6个）
我的老师和同学（不少于6个）
我的心情变奏曲（不少于6个）
我的一天（不少于6个）

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单项选择题

Jack Hemmings bought a 3-month British pound futures contract for 1.4250 at which time he sold the pound futures. If each pound futures contract is for an amount of £62,500, how much money did Jack gain or lose from his speculation with pound futures?

A．$937.50 loss
B．$937.50 gain
C．£937.50 loss
D．£937.50 gain

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Determination of methylmercury, using liquid chromatography-atomic fluorescence spectroscopy, the conversion of methylmercury to _____ and subsequent determination.

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