UnprecedentedAviationMystery
ABoeing777tookofffromMalaysia'slargestcityofKualaLumpurat0:41amonMarch8.
(41)___destinationwasBeijing.Buttheflightneverarrived,(42)___(leave)friendsandrelativesofthepassengersonboardweepingandworrying.
Therewere239people(43)___boardtheMalaysiaAirlinesflight,includingChina,Vietnam,theUS,Singapore,andthePhilippines(44)___still___(search)forthemissingplane.
Its(45)___(disappear)isan"unprecedented(史无前例的)aviationmystery",AzharuddinAbdulRahmanm,headofMalaysia'sCivilAviationAuthority,saidonMarch10.
Therewasnosignof(46)___crash.
Abouttwohoursofaftertakingoff,airtrafficcontrolsuddenlylostcontactwiththeplane.Theweatherwasclear,thepilotsdidn'tmakeanydistresscalls,47___nodebris(碎片)wasfoundinthearea(48)___theflightlastmadecontact.
Besides,airplanecrashes(49)___(typical)occurduringtakeofforlanding.Only9percentoffatalaccidentshappen(50)___aplaneisatcruising(平稳行进的)altitude,accordingtoareportbyBoeinginAugust.
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