叙述了中国煤矿开采技术的现状,分析了中国煤矿开采技术中存在的不足,结合实际工作经验探析了煤矿开采技术在中国未来的发展前景。......

Affective filter hypothesis is one of Krashen’s five hypotheses on Second Language Acquisition (SLA), and it states tha......