题目内容
Questions22to25arebasedonthepassageyouhavejustheard.22.A)Theyhavetolookforfoodandshelterunderground.B)Theytakelittlenoticeofthechangesintemperature.C)Theyresorttodifferentmeanstosurvivethebittercold.D)Theyhavedifficultyadaptingtothechangedenvironment.23.A)Theyhavetheirweightreducedtotheminimum.B)Theyconsumeenergystoredbeforethelongsleep.C)Theycanmaintaintheirheartbeatatthenormalrate.D)Theycankeeptheirbodytemperaturewarmandstable.24.A)Bystayinginhidingplacesandeatingverylittle.B)Byseekingfoodandshelterinpeople'shouses.C)Bygrowingthickerhairtostaywarm.D)Bystoringenoughfoodbeforehand.25.A)Tostaysafe.B)Tosaveenergy.C)Tokeepcompany.D)Toprotecttheyoung
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