存单支取后，做了冲正，接着再支取时系统提示：该号码段重空状态不正确，无法支取，是什么原因（）。 ["存单冲正后要用000501换发存单，原因冲正换发","重空号码输入有误","系统故障","存单不存在"] 简述枕梁结构及组成。 对电信业务营销员仪表的整体要求是什么？ The max effluent of the oil content from a ship of 400 tons gross tonnage and above other than an oil tanker is（）. ["less than 100 parts per million","more than 100 parts per million","at least 100 parts per million","100 parts per millio"] In a diesel engine, exhaust valves open before the intake ports are uncovered to （） Ⅰ.reduce pumping losses Ⅱ.reduce back pressure ["Ⅰonly","Ⅱonly","bothⅠand Ⅱ","neitherⅠnor Ⅱ"] 底架结构的组成有哪些？