What is the main idea of the passage? The pronoun "They" in the second paragraph refers to______.

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问题 What is the main idea of the passage?
The pronoun "They" in the second paragraph refers to______.

选项 A、ornithology and general biological science
B、contributions
C、professional biologists
D、birds

答案C

解析考查考生在语篇水平上正确地理解词、短语或句子的能力。参阅第二段第一句“Professional biologists are not hard put to reel off a list of distinctive contributions that ornithology has made to general biology science．”可知，They=professional biologists。

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职称英语理工类A级

职称英语

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What is the main idea of the passage? The pronoun "They" in the second paragraph refers to______.

职称英语理工类A级

职称英语

Itdoesn’tstandtoreasonthathewouldlie.

Thepassageconfirmsthatusingtanningequipmentisharmfultoone’shealth.ItisimpliedinMr.Levy’sargument(Paragraph5)

Thepassageconfirmsthatusingtanningequipmentisharmfultoone’shealth.Karagasreportedherresearchresultsbasingoni

Thepassageconfirmsthatusingtanningequipmentisharmfultoone’shealth.Melanomaisamoreseriouscancerthanlungcance

Thepassageconfirmsthatusingtanningequipmentisharmfultoone’shealth.Thehighestrateofskincancersisfoundinteen

Theemphasisontheimportanceofeducationhas(spurred)scientificresearch.

Once-dailyPillCouldSimplifyHIVTreatmentBristol-MyersSquibbandGileadScienceshavecombinedmanyHIVdrugsintoasi

Pandemic(大面积流行的)H1N12009ThemostactiveareasofpandemicinfluenzatransmissioncurrentlyareincentralandeasternEur

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Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytoremembersolutionfromthelasttimetheyhada【21】problem.

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