【Teenagersbelieveanythingispossibleifthystudyhard．Buttheyoftenforgettothinkabouthealthydiets（饮食），enoughsleeptimeandexercise．Infact，thesethingsarereallyimportantforthemtokeepfit．Itisimportantforteen】|小学英语问答-字典翻译问答网

【Teenagersbelieveanythingispossibleifthystudyhard．Buttheyoftenforgettothinkabouthealthydiets（饮食），enoughsleeptimeandexercise．Infact，thesethingsarereallyimportantforthemtokeepfit．Itisimportantforteen】

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问题描述：

Teenagersbelieveanythingispossibleifthystudyhard．Buttheyoftenforgettothinkabouthealthydiets（饮食），enoughsleeptimeandexercise．Infact，thesethingsarereallyimportantforthemtokeepfit．

Itisimportantforteenagerstogetenoughenergy．Teenagegirlsneedabout2200caloriesadaywhileboysneedabitmore-doctorssuggest2800forteenageboys50%oftheircaloriesshouldcomefromhealthyfood-rice，begetablesandfruit．Peopleoftensayanappleadaykeepsthedoctoraway．Teenagersalsoneedtodrinkalotofwater，6to8glassesaday．Drinkingenoughwaterwillimprovetheirskin．

Teenagersusuallyneedeighttotenhours'sleepatnight，butmanyChineseteenagersdonotgetenoughsleep．Areportshowsthatwithoutagoodnight's sleep，teenagersseemtobeweakerthantheyshouldbe．Toomuchhomeworkisnottheonlyreasonwhyteenagersstayuplate．SomewatchTVorplaycomputergameslateintothenight．Teenagersshoulddevelopgoodstudyhabits．Sosomecleverstudentsneverstudylate，buttheyareabletoworkwellinclass．

Exerciseissomethingthatcanhelpthem．Expertssuggestthatteenagersshouldspendatleast30minutesexercisingaday，fivetimesaweek．Theywillfeelrelaxedwhentheyexerxise．Itcanevenhelpthemsleepbetteratnight．

46．Howmanythingsareimportantforteenagerstokeepfit？___

A.2

B.3

C.4

47．Halfoftheircaloriesshouldcomefrom___．

A．rice，vegetablesandfruit

B．rice，vegetablesandmeat

C．rice，vegetablesandwater

48．Thelastparagraph（段）mainlytalksabout___．

A．sleepingbetter

B．basicenergy

C．necessaryexercise

49．WhichofthefollowingisNOTtrue？___

A．Boysneedmuchmorecaloriesthangirls

B．Teenagersneedtodrink6to8glassesofwateraday

C．Somecleverstudentsneverstudylate

50．Thepassagetellsteenagershowto___

A．eatanddrinkwell

B．studyhard

C．keepfit．

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　　答案：　　46．B 细节理解题根据第一段中Buttheyoftenforgettothinkabouthealthydiets（饮食），enoughsleeptimeandexercise．Infact，thesethingsarereallyimportantforthemtokeepfit．"但是他们常常忘记了考虑健康饮食、充足的睡眠时间和锻炼．实际上这些事情对他们的健康的确很重要"可知对青少年来说保持健康有三件事即饮食、睡眠和锻炼．故选B 　　47．A 细节理解题根据第二段Teenagegirlsneedabout2200caloriesadaywhileboysneedabitmore-doctorssuggest2800forteenageboys50%oftheircaloriesshouldcomefromhealthyfood-rice，vegetablesandfruit．"十来岁的女孩一天大约需要2200卡路里的能量，而十来岁的男孩稍微多一点，医生建议2800卡路里的能量．50%的卡路里应该来自健康饮食：米饭、蔬菜和水果"可知一半的能量来自米饭、蔬菜和水果，故选A．　　48．C 段落大意题根据最后一段的第一句Exerciseissomethingthatcanhelpthem"锻炼也能有助于他们的身体"可知这一段主要讲述锻炼的必要性．故选C 　　49．A 细节理解题通读全文第二段中提到Teenagersalsoneedtodrinkalotofwater，6to8glassesaday可知青少年一天需要6至8杯水，故B项正确；第三段中提到somecleverstudentsneverstudylate可知一些聪明的学生从不学到很晚，故C项描述正确，最后根据第二段Teenagegirlsneedabout2200caloriesadaywhileboysneedabitmore-doctorssuggest2800forteenageboys"十来岁的女孩一天大约需要2200卡路里的能量，而十来岁的男孩稍微多一点"可知男孩需要的卡路里比女孩稍微多一点，并非多得多，故A项不正确，故选A 　　50．C 主旨大意题根据短文第一段Teenagersbelieveanythingispossibleifthystudyhard．Buttheyoftenforgettothinkabouthealthydiets（饮食），enoughsleeptimeandexercise．Infact，thesethingsarereallyimportantforthemtokeepfit．"青少年认为如果他们努力学习一切皆有可能．但是他们常常忘记了考虑健康饮食、充足的睡眠时间和锻炼．实际上这些事情对他们的健康的确很重要"，然后在接下来的三段中分别从饮食、睡眠和锻炼三个方面介绍如何保持健康．可知短文主要告诉青少年如何保持健康，故选C．