影响培训需求的因素有常规因素和非常规因素。
简述虾维生素C缺乏病的防治方法。
简述个人消费者的购买行为类型的种类。
when (),the provisions of the Bill of Lading will be used as a basis for settlement. an event is in connection with the marine peril at sea。 a matter is linked to a person injury。 a fact is being contacted by Charter Party。 a case is related to dispute about cargo。
没有煤气,只能采用其它燃料烘炉的焦炉投产时是() 装完全炉煤连通煤气后再火道点火。 装完部分炉孔煤连通煤气后火道点火。 边装煤边连通煤气火道点火。
对于一个液化气球罐来说,当球罐收发液化石油气时,该系统就为()。