Single factor randomized block design was used in order to study chemical control effect of two new kinds of high efficiency herbicides Sumisoya and Harness on weeds in potatoes fields.

试验采用单因素随机区组设计，旨在研究禾耐斯与速收两种新型、高效除草剂对马铃薯田杂草的化学防除效果。

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For that we have selected 134 inpatients to performed case-control study and employed single factor and multiple factor analysis in order to get a deeper understand about risk factor of LI.

为此，我们选择了134例住院病人进行了病例对照研究，并采用单因素及多因素分析，旨在对LI发病的危险因素有更深入的了解。

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DESIGN: Single factor analysis of variance (a case-controlled study) SETTING: Laboratory of nutrition and metabolism diseases in a university.

设计：单因素方差分析(分组对照实验)。单位：一所大学的营养与代谢性疾病实验室。

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