单选题:根据下列条件,回答问题:(8分)(生物一现代生物科技专题) 人类在预防与诊疗传染性疾病过程中,经常使用疫苗和抗体。已知某

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根据下列条件,回答问题:(8分)(生物一现代生物科技专题)
人类在预防与诊疗传染性疾病过程中,经常使用疫苗和抗体。已知某传染性疾病的病原体为RNA病毒,该病毒表面的A蛋白为主要抗原,且疾苗生产和抗体制备的流程之一如下图:


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A.remember B.attempted C.bothered D.hesitated

A.remember B.attempted C.bothered D.hesitated

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A. perform B. write C. hear D. question

A. perform B. write C. hear D. question

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A. study B. design C. committee D. staff

A. study B. design C. committee D. staff

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A. expected B. persuaded C. allowed D. advised

A. expected B. persuaded C. allowed D. advised

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From the last paragraph we can learn that __A.some pipes hav

From the last paragraph we can learn that __A.some pipes have to be re-arranged

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