地上储罐组内,单罐容量小于1000m3的储存丙B类液体的储罐不应超过();其他储罐不应超过两排。
A. 四排
B. 两排
C. 一排
D. 三排
电信、移动、联通用户为其他号码设置定时定额代交话费、电信宽带/固话时是否有短信通知?()
A. 有短信通知
B. 没有短信通知
Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?()
A. Holding the valve open for a long period
B. Increasing the starting air pressure used
C. Opening the stating air valve quickly
D. Reducing the starting air valve size
A Document of Compliance differs from a Safety Management Certificate in that the former is issued to ()by the Administration.
A. a ship
B. a company
C. a charterer
D. a manager