AAlthough pearls may be formed by any shelled mollusk, the most valuable pearls are obtained Bfrom the oysters. Except for Cimit

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问题 AAlthough pearls may be formed by any shelled mollusk, the most valuable pearls are obtained Bfrom the oysters. Except for Cimitation pearls, which are entirely man-made, all pearls are formed from a secretion around an irritating body that enters the soft tissue of a mollusk. DIf the irritating body enters the mollusk by accident, a natural pearl forms.

选项 A、
B、
C、
D、

答案B

解析 B项oysters为名词复数，表泛指，前面不应加定冠词the，因此应将from the oysters改为from oysters。

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AAlthough pearls may be formed by any shelled mollusk, the most valuable pearls are obtained Bfrom the oysters. Except for Cimit

考博英语

MichaelYessis,anemeritusprofessorofSportsScienceatCaliforniaStateUniversity,maintainsthat"geneticsonlydetermines

ManychangesaretakingplaceinAmericans’foodstyles.【T1】TheUnitedStatesistraditionallyfamousforitssolidandunchang

Coca-Cola,whichsold10billioncasesofsoftdrinksin1992,nowfindsitselfasking,wherewillsalesofthenext10billion

Graphenemustsurelybeoneofthemostexcitingdevelopmentsinmodernscience.Indeed,thesubstanceissoextraordinarythat

Sleepisanimportantpartofourlives.Wespendaboutone-thirdofourlivessleeping.Formillionsofpeople,【C1】______,gett

Ishallmentiontwoorthreemattersinwhichtheneedforcooperationbetweenphilosophyandscienceisespeciallyintimate.【T

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