The______of medical knowledge are being pushed farther onwards as time goes on.

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问题 The______of medical knowledge are being pushed farther onwards as time goes on.

选项 A、front
B、border
C、frontiers
D、edge

答案C

解析 frontier n.(本义)边境，边界；边疆：(引申)(科学开拓的)新领域(beyond the frontier of knowledge；at the frontier of space exploration)。front n.前面，正面：前线，战线。border n.边界，边境；边缘，界线。edge n.边缘，棱；刀口。

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The______of medical knowledge are being pushed farther onwards as time goes on.

考博英语

KevinRogersusedtobemyboss.Atthattimehewasahard-working,up-and-comingbusinessmanandarealslave-driver,alwayst

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Ourpresentgenerationofculturalcritics,arrivingaftertheassaultofpostmodernismandtheincreasinglywidespreadcommerci

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Honestynolongerseemstobethebestpolicywithtellingofliesbecomingacommonpartofourdailylives.Anewresearchby

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Terrorismhasbecomesowidespreadthatitisnowimpossibletodismissitastheactionofafewcrazypeople.Infact,terroris

Justoverayearago,Ifoolishlylockedupmybicycleoutsidemyoffice,butforgottoremovethepannier.WhenIreturnedthe

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