单项选择题

Researchers have employed all of the following methods in researching potential explanations of the Anasazi evacuation EXCEPT

A．thestudyofmodernIndiansocieties
B．thestudyofclimatologicalrecords
C．thestudyofpottery
D．thestudyofAnasazimythology
E．thestudyofceremonialstructures
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单项选择题
INSTINCT:
A．hesitation
B．unachievablegoal
C．illogicalanxiety
D．acquiredresponse
E．illusion
单项选择题
According to the passage, astronomers studying Martian meteors discovered on Earth were perplexed by them for which of the following reasons
A．ThemeteorsfoundonEarthweretooyoungtohaveoriginatedfromtheimpactsinquestion.
B．ThemeteorsfoundonEarthweretoooldtobeeasilydated.
C．NotenoughimpacteventshavebeenrecordedinrecenthistorytoexplainhowanyyoungmeteorswouldhavereachedtheEarth.
D．ImpactsonMarshavebeensosmallthatscientistsquestionhowanymeteorshavereachedtheearth.
E．TheagedistributionofmeteorsfoundonEarthwasinexplicablybasedtowardyouth.
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