对移动脱轨器使用、保管有何规定？
参考答案：移动脱轨器按作业过程制定专人使用、保管、维修，不用时要固定地点存放并加锁，认真进行交接。
________ by the heavy snowfalls, Chenzhou, a city in South China, was cut off from the outside,
________ water and electricity shortage.[ ]
A. Having struck; facing
B. Having struck; faced
C. Struck; facing
D. Struck; faced
SQL语言可以（）在宿主语言中使用，也可以独立地交互式使用。
A、-极速
B、-嵌入
C、-混合
D、-并行
