1.It even results in geologic hazard;for the mine geologic hazard,the background of physiognomy is the potential factor,while the irrational exploitation is the magistral factor.

1.矿山地的生，地地貌背景是诱的潜在因素，不合理的采方法是诱的主导因素，降雨和水文条件是激生的直接原因。

2.Chapter four is the research on diversity architectures of agriculture technique extension mode, analyzing the necessity that diversified mode constuct. several magistral modes is comparative studied.

2.第四章,多元化农业技术推广模式的构建。