It is A(estimated) that a scientific principle has B(a life expectancy) of approximately C(a decade) before D(it drastically) re

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问题 It is A(estimated) that a scientific principle has B(a life expectancy) of approximately C(a decade) before D(it drastically) revised or replaced by newer information.

选项

答案D

解析 it drastically改为it is drastically，用被动语态。

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It is A(estimated) that a scientific principle has B(a life expectancy) of approximately C(a decade) before D(it drastically) re

考博英语

ThenewtechnologicalrevolutioninAmericannewspapershasbroughtincreased______,awiderrangeofpublicationsandanexpa

Weshouldmakeaclear______between"competent"and"proficient"forthepurposesofourdiscussion.

Onebusyday,Iwasracingaroundtryingtogettoomuchdone,andIexclaimedtomythreekidsinthecar,"Wecangetboththi

Amongthemanywaysinwhichpeoplecommunicatethroughspeech,publicspeakinghasprobablyreceivedmorestudyandattractedm

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