The floors in a vessel’s hull structure are kept from tripping,or folding over,by(). ["face plates","bottom longitudinals","longitudinal deck beams","transverse deck beam"]
简述劳动规章制度审查、修订的原则。
简述成品油罐检实尺的方法?
数学教学的方法有() ["程序教学法","发现法","自学辅导法","尝试指导效果回授法"]
以煤炭为例,说明散货的堆密度该如何获取?
简述劳动规章制度制定的程序。