试述开拓方式确定的原则是什么?
时差是指一个活动在不延迟项目的完工时间情况下,所能延迟的时间数量,它也被称为以下说法,除了:() ["闲散时间","总时差","路径时差","自由时差"]
月经先期,量多,色淡,质稀,神疲肢倦,小腹空坠,纳少,舌质淡,脉细弱,属()。 ["气虚","虚热","实热","肝郁","肾虚"]
确定矿井服务年限时为何要考虑储量备用系数?
下列病症除哪一项外,均与肝郁气滞有关?() ["月经先后无定期","月经前后诸症","闭经","恶漏不绝","以上均是"]
试述开拓方式有哪些分类?