式输送机长度超过()时,各重要工作地点,必须设置中间“紧急停机”按钮或拉线开关。A、 发布时间:2017-04-25 16:19 │ 来源:www.tikuol.com 题型:单项选择题 问题: 式输送机长度超过()时,各重要工作地点,必须设置中间“紧急停机”按钮或拉线开关。A、30米B、40米C、50米
题型:单项选择题 Entering the reading room, ______.A.Mike and Tom were found seated quietly, doing their homeworkB.Mike and Tom were found seating quietly, doing their homeworkC.he found Mike and Tom seating quietly, doing their homeworkD.he found Mike and Tom seated quietly, doing their homework 查看答案