矿井转入新水平或改变一翼通风系统后,不用进行矿井阻力测定。 发布时间:2018-02-07 18:33 │ 来源:www.tikuol.com 题型:判断题 问题: 矿井转入新水平或改变一翼通风系统后,不用进行矿井阻力测定。
题型:判断题 A Direct Method teacher is usually found using techniques such as ().A. direct association and conversation practiceB. question and answer exercisesC. error correction and dictationD. all of the above 查看答案