What does the passage mainly discuss? Why does the author mention a bell and a rattle in lines 4-5 ?

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问题 What does the passage mainly discuss?
Why does the author mention a bell and a rattle in lines 4-5 ?

选项 A、To contrast the reactions of babies to human and nonhuman sounds
B、To give examples of sounds that will cause a baby to cry
C、To explain how babies distinguish between different nonhuman sounds
D、To give examples of typical toys that babies do not like

答案A

解析

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托福（TOEFL）

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【B1】【B3】

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What does the passage mainly discuss? Why does the author mention a bell and a rattle in lines 4-5 ?

托福（TOEFL）

Studentswhosepreviouseducationalexperiencewas______oftenfindithardtobecomeindependentlearners.【35】

Whichofthesemedicalprofessions,onaverage,earnstheleast?

ThespeakerworkswithintheFacultyof______

Completethesentencesbelow.WriteONEWORDONLYforeachanswer.HowtheextremophilessurviveAccesstothesun’sheatcanc

ChooseTWOletters,A-E.WhatTWOthingsdoBradandHelenagreetosayaboutlisteningingroups?AListeningskillsareoften

Choosethecorrectletter,A,BorC.Whichofthefollowingisnotallowedtobetakenontheflight?

Completethenotesbelow.WriteONEWORDONLYforeachanswer.ChimpanzeeBehavioursSpeciesWecanfindPanorPanTroglody

Whichattitudeisassociatedwiththefollowingpeopleduringtheconversation?ChooseSIXanswersfromtheboxandwritetheco

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ForestryForestFireAccordingtotheinstructor,whyisperiodicfirenecessarytoforestecosystems?Clickontwoanswers.

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A、ShephonedFredaboutthebook.B、Shewaslatefortheappointment.C、SheranintoFredonherwayhere.D、Sheoftenkeepsoth

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石灰稳定土类混合料组成设计时，成型好的试件应在规定温度下保温养护6d，浸水24h后，再进行无侧限抗压强度试验()。

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词义对现实现象的反应是一种抽象、概括的反映，这种概括性的表现形式包括()。

【B1】【B3】