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年职称英语综合类概括大意复习题20XX年职称英语综合类概括大意复习题 strength aloneknows conflict,weakness isbelow evendefeat,and isborn vanquished.以下是为大家搜索的20XX年综合类概括大意复习题,希望对正在关注的您有所帮助!更多精彩内容请及时关注我们! Airplanes areused tocarry passengers,cargo andmail.Air transportpanies operatescheduled airlinesand non-scheduled servicesover local,regional,national,and internationalroutes.The aircraftoperated bythese paniesrange fromsmall single-engine planesto largemultiengine jettransports. The firstair passengerservices began in1910,when dirigiblesbegan operationbetween severalGerman cities.The firstscheduled airplaneservice tocarry passengersbeganinthe U.S in
1914.Several experimentalairmail flightstook placein India,Europe,and theUnited Statesbefore WorldWar I,but airtransport servicedid notbee atrue businessuntil afterthe war. During WorldWar Two,intercontinental airtransport becamefirmly established.After thewar thenew long-distance transportswith adva...。