Whichprocedureisrecommendedtopreventorovercomespatialdisorientation?（）
A. Reduceheadandeyemovementtothegreatestpossibleextent,
B. Relyonthekinestheticsense.
C. Relyentirelyontheindicationsoftheflightinstruments.
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WhilemakingprolongedconstantrateturnsunderIFRconditions,anabruptheadmovementcancreatetheillusionofrotationonanentirelydifferentaxis.Thisisknownas（）
A. autokinesis
B. Coriolisillusion
C. theleans
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
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