井巷掘进主要施工方法中的特殊凿井法是在不稳定或含水量很大的地层中,采用非钻爆法的特殊技术与工艺的凿井方法。 井巷掘进主要施工方法中的特殊凿井法是在不稳定或含水量很大的地层中,采用非钻爆法的特殊技术与工艺的凿井方法。 分类:基础知识 题型:判断题 查看答案
News came from the sales manager____________the new product News came from the sales manager____________the new product had been selling wel 分类:基础知识 题型:判断题 查看答案
_________up at the clock on the wall, the secretary found it _________up at the clock on the wall, the secretary found it was already midnigh 分类:基础知识 题型:判断题 查看答案