WhilemakingprolongedconstantrateturnsunderIFRconditions,anabruptheadmovementcancreatetheillusionofrotationonanentirelydifferentaxis.Thisisknownas（）
A. autokinesis
B. Coriolisillusion
C. theleans
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Theleansisastateofdisorientationwhichoftenoccurswhen（）
A. anabruptchangefromaclimbtostraightandlevelflight
B. anaircraftwhichhasbeeninashallowturnforsometimerollsbacktolevelflight
C. anabruptrecoveryorarapidcorrectionismade
Apilotismoresubjecttospatialdisorientationwhen（）
A. ignoringorovercomingthesensationsofmusclesandinnerear
B. eyesaremovedoftenintheprocessofcross-checkingtheflightinstruments
C. bodysensationsareusedtointerpretflightattitudes
Anabsenceofvisiblegroundfeature,suchaswhenlandingoverwater,darkenedareasorterrainmadefeaturelessbysnow,cancreatetheillusionthat（）
A. theaircraftisataloweraltitudethanisthecase,whichmayleaddescendstoolowonapproach
B. theaircraftisatahigheraltitudethanisthecase,whichmayleadapilotdescendstoolowonapproach
C. theaircraftisatahigheraltitudethanisthecase,whichmayleadapilotdescendstoohighonapproach
Insensingtheorientationofthebodyinspace,thebrainassignsthehighestprioritytoinformationcomingfrom（）
A. theeyes
B. theinner
C. theproprioceptivesystem
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