PASSAGE ONE According to the scientists, what causes the common occurrence of rickets among children?

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问题 PASSAGE ONE
According to the scientists, what causes the common occurrence of rickets among children?

选项

答案In sufficent exposure to natural sunshine and improper diet.

解析第二段中提到：The disease is caused by chronic vitamin D deficiencies，which carl be triggered by long periods out of natural sunlight and a poor diet. 可见长时间日照不足、饮食不合理，会造成长期的维生素D缺乏，从而诱发佝偻病。

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专业英语四级

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PASSAGE ONE According to the scientists, what causes the common occurrence of rickets among children?

专业英语四级

A.negligibleB.overuseC.proceduresD.abnormalE.patientsF.potentialG.compliedH.collaboratedI.madeJ.involved

A、Gettingchildrentopaintonthewallofbuildings.B、Gettingschoolchildrenintheareatowriteastory.C、Gettinganartis

A、Whenshewas32.B、Whenshewas17.C、Afewweeksafterhersonwasborn.D、6monthsbeforeshegotmarried.D选项都为时间，且均含有she，故

A、Asearlyaspossible.B、48hoursinadvance.C、24hoursinadvance.D、6hoursinadvance.B细节题。对话中图书管理员说：“Mostpeopletendto

A、Yourspousewouldpayyourchildren’stuitionfees.B、Yourchildrenwouldbeeligibleforfinancialaid.C、Yourchildrenwould

His_______brainandboundlessenergydrovehimfromonegreatinventiontoanother.

Ascholar’sprofessionalethicsareessentialtohiscareerandinasensedeterminehiscontributionstothepublic.Whatdoth

(1)IstartfrommyhomeinthequietlittlesuburbofForestHills,LongIsland.Here,surroundedbygreenlawns,trees,andflo

(1)ConservationistsonTuesdayappealedtocountriestourgentlyaddressnewthreatstowhales,dolphinsandothercetaceans(鲸

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