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.
矿山地
的发生，地地貌背景是诱发的潜在因素，不合理的开采方法是诱发的主导因素，降
和水文条件是激发难发生的直接原因。
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.
矿山地的发生，地地貌背景是诱发的潜在因素，不合理的开采方法是诱发的主导因素，降和水文条件是激发难发生的直接原因。
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.
第四章,多元化农业技术推广模式的构建。
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