The research scientists often meet with problems______new types of instrument for their solution.

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问题 The research scientists often meet with problems______new types of instrument for their solution.

选项 A、requiring
B、required
C、to require
D、being required

答案A

解析此题应选现在分词requiring，在句中作定语，修饰problems，相当于定语从句…problems which require．．．，因为它们在逻辑上是主动关系，所以应选现在分词。句意为：“科研人员常常遇到需要新型仪器才能解决的问题。”

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The research scientists often meet with problems______new types of instrument for their solution.

在职攻硕英语联考

Whichissafer—stayinghome,travelingtoworkonpublictransport,orworkingintheoffice?Surprisingly,eachofthesecarrie

TheJapanesescientistshavefoundthatscents______efficiencyandreducestressamongofficeworkers.

OntheafternoonofJuly2,1936,NaziSSleaderHeinrichHimmlerandacoterieofhisseniorofficersparadedonfootthrought

EnvironmenthastakenratherabackseatpoliticallysincetheEarthsummitinRiodeJaneironearlyfiveyearsago.【C1】______th

EnvironmenthastakenratherabackseatpoliticallysincetheEarthsummitinRiodeJaneironearlyfiveyearsago.【C1】______th

AcenturyagointheUnitedStates,whenanindividualbroughtsuitagainstacompany,publicopiniontendedtoprotectthatcom

Thequestionofwhetherwarisinevitableisonewhichhasconcernedmanyoftheworld’sgreatwriters.Beforeconsideringthis

Thenotionthatinanimateobjectsaresubjecttotheirownexperiencemaysoundabsurd;anditis.However,thereasontodismis

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男性，25岁。反复腹泻2年。粪常规除见少许红、白细胞外无异常，粪细菌培养(一)，纤维结肠镜检查见直肠及乙状结肠黏膜充血、水肿，质地脆、易出血。最可能的诊断是

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