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

Itis______whodecideswhethertheaccusedisinnocentorguilty.

Workathomemomsfacechallengesthatareveryunique.Thedecisiontoworkoutsidethehomeorstaywithyourchildrenisdiff

Atthebeginningofthenineteenthcentury,workersweredifferentiatedbyskill,income,andrelativeopportunitiesforadvance

Manyparentsareconcernedthattheirchildrendonotconsumetheproperfoodstheyneedtostaystrongandhealthy.Thetruthi

Ourshasbecomeasocietyofemployees.AhundredyearsorsoagoonlyoneoutofeveryfiveAmericansatworkwasemployed,i.

Ididn’tstopatJohn’shousebecausehehadvisitors,andIdidn’twanttobuttin.

DuringMcDonald’searlyyearsFrenchfriesweremadefromscratcheveryday.RussetBurbankpotatoeswere【1】,cutintoshoestrin

Inthe_____chapters,theprofessorhastracedtheredefinitionofBritain’sglobalpositioninrecentdecades.

Hurricanesareviolentstormsthatcausemillionsofdollarsinpropertydamageandtakemanylives.Theycanbeextremelydange

Butlikemany,TurnerisgrowingalittletiredasFlorida’sbusyhurricaneseasoncontinuesto____nervesandextendhardships.

Justbecausetheycan’tsingoperaorrideabicycledoesn’tmeanthatanimalsdon’thaveculture.There’snobetterexampleof

A．足少阳胆经B．足厥阴肝经C．足阳明胃经D．足太阴脾经E．任脉在经脉循行中，有1条支脉的是

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求．

数据字典是软件需求分析阶段的最重要的工具之一，其最基本的功能是________。

在数据库管理系统提供的数据语言中，负责数据的查询、增加、删除和修改等操作的是()。

Questions1-4Thetexthas7paragraphs(A—G).Whichparagraphcontainseachofthefollowingpiecesofinformation?*