The problem of population is mainly man-made. Now, for human beings, eighty, ninety are coming to be recognized as

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问题 The problem of population is mainly man-made.
Now, for human beings, eighty, ninety are coming to be recognized as

选项

答案a normal age

解析第6段倒数第2句，现在80-90岁的人被称为正常寿命。

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大学英语六级

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The problem of population is mainly man-made. Now, for human beings, eighty, ninety are coming to be recognized as

大学英语六级

There’snothingradicalabouttheideathatgovernmentsshouldinterveneinthefoodbusiness.Governmentsandpeopleseemtoag

Googlemustbethemostambitiouscompanyintheworld.Itsstatedgoal,"toorganizetheworld’sinformationandmakeituniver

A、Therightsofprivatebusinessownersshouldbeprotected.B、Thegovernmentshouldn’tinterfereinprivatebusiness.C、Politic

A、Traineesarerequiredtosigncontractsinitially.B、Trainees’performanceisevaluatedoccasionally.C、Trainees’startingsal

A、Drivinginunsettledweather.B、Takinglongdrivesoutsidethecity.C、Meetinginterestingpeopleinthecity.D、Beingableto

Itistruethattheworldfacesproblemsofpollution,butitcan______(通过全球的努力加以控制).

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