单体液压支柱在井下储存()以上或采完一个工作面后,必须升井检修,不得直接转入其他接续 发布时间:2019-10-20 22:34 │ 来源:www.tikuol.com 题型:填空题 问题: 单体液压支柱在井下储存()以上或采完一个工作面后,必须升井检修,不得直接转入其他接续面使用,检修后逐根试验,不合格的不得下井使用。
题型:填空题 —Did you see Mr Smith when you were in France?—No, when I _____ France, he had gone to China.[ ]A. had arrived toB. arrived toC. had got toD. got to