Based on GIS technology, agricultural land gradation was studied applying factor method and modifying method in the centre of Leshan City, Sichuan Province.

以GIS为平台，采用修正法和因素法相结合，对乐山市中区农用地定级进行了研究。

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After confirming the power of factor, choosing the model of gradation, the results of gradation was worked out by modifying method and factor method.

通过确定因素权重、选择定级模型，计算出修正法和因素法两种定级结果。

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The rate of correct answer of the mainstay of hypertension therapy strategy and appraisal gradation principal of risk factor was less than 60.0%.

对高血压治疗策略制定的主要依据及危险因素评估分层原则等知识的正确掌握率<60·0%。

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