It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.

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问题 It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.

选项 A、were conducting
B、were conducted
C、had been conducted
D、had conducted

答案C

解析

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专业英语四级

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It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.

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Crimeplaguesoursociety,almostallaroundusinourdailylives.Dailywehearmanyinstancesof【C1】______crimessuchasmurd

Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkglassesornot,theyfindthemselves【C1】______headaches

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Seventy-four-year-oldsarethemost【C1】______peopleinthepopulation,accordingtoanewresearch.Fewerresponsibilities,fina

Isthereapopulationproblem?Myanswer【C1】______thequestionis"YES",thereisaproblem.Thescaleofhumanactivitiesisno

WhichofthefollowingstatementsisINCORRECT?Wecaninferfromthepassagethatthehigherthelinesareseen,the______the

Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,thechoiceofan【C1】should【C2】evenbefor

JohnhasworkedinallofthefollowingplacesEXCEPT______.

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因国际货物买卖合同或者技术进口合同发生争议，其诉讼时效为()年。

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It______on the Internet with respondents who volunteered to participate, and was not a scientifically random survey.

专业英语四级

Crimeplaguesoursociety,almostallaroundusinourdailylives.Dailywehearmanyinstancesof【C1】______crimessuchasmurd

Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkglassesornot,theyfindthemselves【C1】______headaches

Streetsellers,particularlyindevelopingcountries,【C1】______largeamountsoffoodtopeople【C2】______lowincomes.Thissector

Seventy-four-year-oldsarethemost【C1】______peopleinthepopulation,accordingtoanewresearch.Fewerresponsibilities,fina

Isthereapopulationproblem?Myanswer【C1】______thequestionis"YES",thereisaproblem.Thescaleofhumanactivitiesisno

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梯形螺纹的综合测量应使用()。

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Streetsellers,particularlyindevelopingcountries,【C1】largeamountsoffoodtopeople【C2】lowincomes.Thissector

Mostworthwhilecareersrequiresomekindofspecializedtraining.Ideally,thechoiceofan【C1】should【C2】evenbefor