Among humans, the effects of aging vary from one individual to another. The average life ______ for Americans is around 5 years,

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问题 Among humans, the effects of aging vary from one individual to another. The average life ______ for Americans is around 5 years, almost twice what it was in the early 190Os.

选项 A、spectrum
B、expectation
C、expectancy
D、width

答案C

解析 (expectancy预期)。句意为：在人群中，衰老的影响因人而异。美国人的平均预期寿命大约是75岁，差不多是20世纪初期的两倍。A．spectrum光谱，B．expectation期望，期待；D．width广阔。

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Among humans, the effects of aging vary from one individual to another. The average life ______ for Americans is around 5 years,

考博英语

Writeashortcompositionofabout250to300wordsonthetopicTheAdvantagesofOwningaBusiness.WriteitneatlyonANSWER

Afterseveralnucleardisasters,a______hasragedoverthesafetyofnuclearenergy.

OnApril20,2000,inAccra,Ghana,theleadersofsixWestAfricancountriesdeclaredtheirintentiontoproceedtomonetaryuni

Biologically,thereisonlyonequalitywhichdistinguishesusfromanimals:theabilitytolaugh.Inauniversewhichappearst

Youmustletmehavetheannualreportwithout______byteno’clocktomorrowmorning.

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Onebusyday,Iwasracingaroundtryingtogettoomuchdone,andIexclaimedtomythreekidsinthecar,"Wecangetboththi

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GeorgeOrwell’sNineteenEighty-fourwasfarmoreprescientthananypersonwhogrewupinthemiddledecadesofthe20thcentur

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