强制放顶是用()的方法人为地将顶板切断。 A.爆破 B.机械 C.机掘 发布时间:2018-08-24 23:48 │ 来源:www.tikuol.com 题型:单项选择题 问题: 强制放顶是用()的方法人为地将顶板切断。A.爆破B.机械C.机掘
题型:单项选择题 (2014·乌鲁木齐地区高三第一次诊断)________means that you have a positive attitude toward your abilities and life.A.Be confident B.Being outgoingC.To be outgoingD.Being confident 查看答案