I have no idea what life would be like without water. The underlined part means "_____". [ ]

A. don't remember

B. don't know

C. don't believe

D. don't expect

使用TDCS和CTC系统时，车站值班员接收的调度命令（附件4）不再人工填记（）相关项目。《调度命令登记簿》纳入车站应急备品柜保管。

A.签收

B.签阅

C.《调度命令登记簿》

D.车站值班员交接班簿