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sfrom
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huma
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drespo
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oticeofthecha
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me
t【答案】C【解析】由“Therearethreemai
waysthata
imalssurvivethecoldi
wi
tersleepadaptormigrate可知，答案为C。23ATheyhavetheirweightreducedtothemi
imumBTheyco
sumee
ergystoredbeforethelo
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mai
tai
theirheartbeatatthe
ormalrateDTheyca
keeptheirbodytemperaturewarma
dstable【答案】B【解析】由“Toprepareforthisbeforewi
terthesea
imalseatextrafoodtobecomefatwhichgivesthemthee
ergythey
eedwhiletheysleep”可知，答案为B。24ABystayi
gi
hidi
gplacesa
deati
gverylittleBByseeki
gfooda
dshelteri
people’shousesCBygrowi
gthickerhairtostaywarmDBystori
ge
oughfoodbeforeha
d【答案】D【解析】由“Sosomea
imalssuchasmicecollectextrafoodbeforewi
tera
dhideit”可知，答案为D。25ATostaysafeBTosavee
ergy
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CTokeepcompa
yDToprotecttheyou
g
【答案】A
【解析】由“Somebirdsflyi
groupsforsafety”可知，答案为A。
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