题目内容

All of the following are stable at pH 3 EXCEPT ()

A. Coxsackie A Viruses
B. Coxsackie B Viruses
C. Echoviruses
D. Polioviruses
E. Rhinoviruses

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Of the following viruses, which one mostly establish subclinical infection? ()

A. Measles virus
B. Polio virus
C. Rabies virus
D. Hantann virus
E. HBV

Which virus spread by the fecal-oral route? ()

A. HAV
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C. HIV
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A. Hepatius A
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C. Hepatitis C
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B. Rotavirus
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E. Papillomavirus