A. 可燃物质 B. 氧化剂 C. 氧 D. 初始着火源
A. 180°绩效考评 B. 全面绩效考评 C. 360°绩效考评
A. an above-deck datum such as the top of the ullage pipe B. the tank ceiling aboard transversely framed vessels C. the tank top D. a thievage mark below the edge of the deck
A. 电路 B. 通路 C. 断路 D. 短路