题目内容

Soil is a heterogeneous system, composed of solid, liquid and gas phases.

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The essential feature of soil is rock weathering.

Soil fertility is soil productivity, which refers to the ability of soil to produce plant products.

Soil is an important environmental factor, which is the buffer zone and filter of environmental pollutants.

变量显著性检验应用最普遍的是F检验。（）