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组合练(二)
(限时35分钟)
Ⅰ.阅读理解
A
Ifyouthoughtpilotsdimmed(调暗)thelightsbeforetakeofftogiveyousomeshuteye,thinkagain.Believeitornot,thedimlightingcouldactuallyhelpsaveyourlifeincaseofaplaneemergency.
Thedimmedlightsbeforetakingofftherunwayandlandingareaflightprecautionusedtohelppassengers’eyesadjustquickerduringanemergencyescape.“Goingfromabrightlylitenvironmenttoonethat’scompletelydarkwouldrequiresometimeforoureyestofocusandseetheescapeslide,”AliceTheriault,servicedirectorforAirCanada,wroteinapressstatement.“Sinceweneedtohaveallthesecondsonoursideintheeventofanemergency,dimmingthelightsisoneofmanystepswetaketoensurethesafetyofourcustomers.”
Thephenomenonthatyoureyesseethosestrangespeckles(小斑点)asyoursightadjuststoadarkplaceafterbeinginalightplaceiscalleddarkadaptation.Itnormallytakesoureyesabout20to30minutestoseebestinadarkroom.Thebrighterthelightsare,thelongerittakesforoureyestoadjust,whichiswhydimmingtheplanelightscouldshortenyour“darkadaptation”timesinceyouhaven’tbeensittingunderfluorescentbulbs(荧光灯)duringallflight.
Notonlydoesdimminglightsaddvaluabletimetotheescapeprocess,itreducesthetensiononyoureyesifyouneedtolookoutside,orseetheemergencylightingalongthepassage.“Ithelpskeepyouintherightdirection,”PatrickSmith,anairlinepilotandauthorofCockpitConfidentialtoldTheTelegraph.“Italsomakesiteasierforflightattendantstoassessanyoutsiderisks,suchasfireordebris,whichmightaffectanescape.”Sonexttimeapilotdimsthelights,justknowit’sforyoursafety,eventhoughitcreatesagentleatmosphereforyourtakeoffintothesky.
1.Thelightsareturneddownbeforetakeofftohelppassengers.?
A.takeashortbreak
B.escapeintimeofemergency
C.createa