2017年9月22日 -  扫码下载作业帮 搜索答疑一搜即得 答案解析查看更多优质解析 解答一 举报 要结合上下文看情况,它要是指代的是一个整体就用单数is,要是...

2019年3月5日 - Culture can affect aviation safety through its effect on how the flight crew deals with difficult situations; cultures with lower power dist...

2018年10月7日 - Docking specifically refers to joining of two separate free-flying space vehicles. Berthing refers to mating operations where an inactive mo...

2011年12月19日 - submarine crewmotley crewexperienced crewskeleton crewv.+n..必应词典为您提供crew的释义,美[kru],英[kruː],n. (轮船、飞机等上面的)全体工作人员...