连词成句：(请注意第2小题动词的变化)

小题1:the, student, are, results, here, of, survey, activity, the

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小题2:bad, is, TV, much, for, your, watch, too, eyes

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小题3:the, often, he, use, does, how, Internet

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小题4:what, the, in, I, like, teacher, wonder, my, was, past

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小题5:never, is, for, he, late, school

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投资组合理论被用于处理风险管理决策，是用概率分布和标准差来量化风险和预期回报之间的权衡。其中收益预期关系式中的R代表投资损失，P是概率分布。