关于挖掘机的操作安全,以下说法正确的是: A. 可以在多机作业的情况下使用所有驾驶员都知道的信号,进行沟通,确保安全作业 B. 挖掘机行走时,不要让人员逗留在挖掘机的周围 C. 在斜坡上斜着横穿或改变方向有引起侧滑、翻车的危险,采取暂时下到平地上迂回等方法安 进行行走 D. 在上坡或下坡时,要把铲斗放在行走的方向,离地约0.2 至0.3 米
【单选题】So long as teachers fail to distinguish between teaching and learning, they will continue to undertake to do for children that which only children can do for themselves. Teaching children to read is n...
【单选题】So long as teachers fail to distinguish between teaching and learning, they will continue to undertake to do for children that which only children can do for themselves. Teaching children to read is n...