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问题：Judgingfromrecentsurveysmostexpertsinsleepbehavioragreethatthereisvirtuallyanepidemic（流行病）ofsleepinessinthenation．“Ican’tthinkofasinglestudythathasn’tfoundAmericansgettinglesssleepthanthey
答案：↓↓↓ 吕铁英的回答： 网友采纳 1.C2.A3.A4.B5.C 分析： 本文主要讲了研究员对睡眠不足对人类的影响做试验研究。1.根据Todeterminetheconsequencesofsleep-deficit，故选C。2.根据We’vefoundthatifyou’reinsleepdeficitperformancesuffers”saysDr．David．“Short-termmemoryisweakenedasareabilitiestomakedecisionsandtoconcentrate．”，故选A。3.根据“Thebestsleephabitsoncewereforcedonuswhenwehadnothingtodointheeveningdownonthefarmanditwasdark．”，故选A。4.根据Perhapsthemostmercilessrobberofsleepresearchessayisthecomplexityoftheday．Wheneverpressuresfromworkfamilyfriendsandcommunityincreasemanypeopleconsidersleeptheleastexpensiveitemontheirprograms，故选B。5.根据throughasetofpsychologicalandperformancetestsrequiringthem，故选C。 考点： 说明文阅读理解。 点评： 做这类题要有理有据，以文中所给事实细节为依据，全面把握作者思路与文章脉络，对隐含的观点进行合理推测与判断，深入领会作者“言外之意”，切忌主观臆断，断章取义，曲解作者本意。 | 
