吊笼中作业的人员必须拴好安全带并(),否则桥吊司机有权利和义务拒绝作业。A、采取蹲姿 发布时间:2017-08-11 13:28 │ 来源:www.tikuol.com 题型:单项选择题 问题: 吊笼中作业的人员必须拴好安全带并(),否则桥吊司机有权利和义务拒绝作业。A、采取蹲姿B、站好C、排好队D、以上都不是
题型:单项选择题 历史上的工业革命浪潮经历了两个发展阶段,我们习惯上分别称之为“蒸汽时代”和“电气时代”,这样划分的主要依据是[ ]A.机械特色不同B.构成材料不同C.交通工具不同D.能源动力不同 查看答案
题型:单项选择题 A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be().A.labeled empty and recharged as soon as possibleB.replaced in its proper location if weight loss is no more than 25%C.replaced in its proper location regardless of weightD.replaced in its proper location if weight loss is no more than 15% 查看答案