【简答题】Commercial airliners are generally (1) _______ by two operators, a captain and a co-pilot. The captain is (2) __________, and carries the responsibility for decisions made during the course of a fligh...
【判断题】水合物分子式:一般用M·nH2O 表示,M为水合物中的气体分子,n为水分子数。如CH4·6H2O,C2H6·6H2O,C3H8·17H2O,i C4H10·17H2O ,H2S·6H2O,CO2·6H2O。Molecular formula: generally expressed as M·nH2O, where M is the gas molecule in hydrate and n is...
【简答题】听力填充: Commercial airliners are generally (1) _______ by two operators, a captain and a co-pilot. The captain is (2) __________, and carries the responsibility for decisions made during the course of a...