When was man’s life changed in many ways? What is the article mainly about?

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问题 When was man’s life changed in many ways?
What is the article mainly about?

选项 A、Fire and metals are both very important.
B、The science of preparing metal for use began before the use of fire.
C、Tools, weapon and decorations can only be made from metals.
D、Fire has been playing an very important part in their life and work since human beings mastered its use.

答案D

解析全文一直在讲：自人类掌握火的用法以来，火在人类工作和生活中的作用，所以选项[D]为正确答案。

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本试题收录于：公共英语二级笔试题库公共英语（PETS）分类

公共英语二级笔试

公共英语（PETS）

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When was man’s life changed in many ways? What is the article mainly about?

公共英语二级笔试

公共英语（PETS）

InBritain,peoplehavedifferentattitudestothepolice.Mostpeoplegenerally【C1】______themandthejobtheydo—althoughther

Theevolutionofartificialintelligenceisnowproceedingsorapidlythat【C1】______themiddleofthiscenturycheapcomputers【C

SupposeyouareinvitedtoapartyatNancy’shomebutyoucan’tattenditbecauseyouwillhaveanexamonthesameday.Write

CharlesSwecker:Thankyouforgettingitrightinyourarticlesonhowtomakeabetterstudent.Asaneducator,I’msure

EducationalprogramsforadultsweregrowingfastintheUSduringthe1970sand1980s.In1985,part-timestudentsaccountedfo

Americanarchitectureisatitsbestwhenitisconcernedwithbuildingsthathaveapracticalpurpose.Factories,officebuildi

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ThemostfrighteningwordsintheEnglishlanguageare,"Ourcomputerisdown."Youhearitmoreandmorewhenyouareonbusi

Liu:Tome,workisfirstandmychildissecond.Iworkmoreformyselfthanformychildbecauseit’stheonlywaytobe

Thelawyerisapersonwithaveryspecialknowledgeofthelaw—boththecivilandcriminal.Becauseofthisknowledgethelawye

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汉代耧车的功能是()。

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设f(x)在(－a，a)(a＞0)内连续，且f’(0)=2．证明：对0＜x＜a，存在0＜θ＜1，使得∫0xf(t)dt+∫0－xf(t)dt=x[f(θx)－f(－θx)]；