What is the passage mainly about? According to the US National Heart, Lung and Blood Institute, the reason why older mothers’ c

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问题 What is the passage mainly about?
According to the US National Heart, Lung and Blood Institute, the reason why older mothers’ children tend to be obese remains ______ .

选项

答案not entirely clear

解析根据题干中的US National Heart，Lung and Blood Institute定位至第六个小标题下第二段，再根据题干其他信息the reason why older mothers’ children tend to be obese remains，准确定位至该段最后一句：why this should be so is not entirely clear，remains与is的语法功能及意思一致，因此可填入not entirely clear。

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大学英语六级

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What is the passage mainly about? According to the US National Heart, Lung and Blood Institute, the reason why older mothers’ c

大学英语六级

A—SupplyagreementJ—PortofarrivalB—TradeagreementK—PromptshipmentC—Long-termcontractL—CashagainstdeliveryD—Salesco

Thebusinesscycleiscomposedofmanyphasesandoneofthemistheexpansionphase.Thisphaseisatwo-foldone,includingre

Collegeisaplacetoexploremanypossibilities;soyoureallycan’tdoitall—unlessyoumanageyourtimewisely.Herearesom

Amealcontainingfishandvegetablesisconsidereda(health)______one.

Ifabusinesswantstosellitsproducts(international)______,itshoulddosomeworldmarketresearchfirst.

Whenyoubuylifeinsurance,youwantapolicythatfitsyourneedsatareasonablecost.Yourfirststepistodeterminehowmu

DISCLAIMER:Thise-mailisconfidentialandshouldnotbeusedbyanyonewhoisnottheoriginalintendedrecipient(收件人).Ifyou

A—physicalcheck-upJ—senseofwell-beingB—biologicalclockK—face-liftC—pulserateL—compulsiveover-eatingD—highbloodpres

A—proofofdeathH—releasecertificateB—bodilyharmI—copyrightlawC—keywitnessJ—sumofclaimD—rightofauthorK—housearre

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一批树苗，如果分给男女生共同栽，平均每人栽6棵；如果只分给女生栽，平均每人栽10棵。如果只分给男生栽，平均每人栽()棵。

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