Test of choosing ulture mediums of the holy land violet rape 圣地紫罗兰油菜栽培基质的选择试验
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You keep hitting a failure point . . 而当你选择试验对象时. .
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You keep hitting a failure point . . 而当你选择试验对象时. .
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You keep hitting a failure point 而当你选择试验对象时
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The following two chapters introduce the theory of discrete choice model and discrete choice experiment and how to design the experiment and estimate the model by programming sas codes 在系统分析的基础上，本文介绍了离散选择模型和离散选择试验的基本原理及其在市场研究中的应用，并初步的探讨了离散选择试验设计和模型拟合的sas程序实现。
