登高焊接与热切割作业是指焊工在坠落高度基准面()m以上。A、1 B、2 C、4 发布时间:2017-10-26 10:18 │ 来源:www.tikuol.com 题型:单项选择题 问题: 登高焊接与热切割作业是指焊工在坠落高度基准面()m以上。A、1B、2C、4
题型:单项选择题 –What has happened to Jack? –He’s had one of his legs _____trying to save a boy from the fire.A.injuringB.injuredC.being injuredD.to be injured 查看答案