拆挂母线时,应有防止钢丝绳和母线弹到邻近带电设备或母线上的措施。
A. 正确
B. 错误
变更调车作业计划前,必须取得()的同意;涉及变更到发线的作业,还应取得()的同意。
On a semisubmersible ship,reserve buoyancy is increased by the presence of void spaces above the waterline in the().
A. submerged hulls
B. quarters
C. columns and upper structure
D. submerged connecting structure
心胸中大寒痛,呕不能饮食,腹中寒,上冲皮起,出见有头足,上下痛而不可触近,治用()
A. 附于粳米汤
B. 大建中汤
C. 理中汤
D. 赤丸