题目内容

Which part of viral replication cycle characterizes eclipse phase?()

A. attachment
B. penetration
C. uncoating
D. synthesis of viral components
E. assembly and release

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Which antigen is used to divide influenza viruses onto types A, B and C? ()

A. HA+NA
B. NP+MP
C. M1P
D. M2P
E. RNP

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

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

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
B. HBV
C. HIV
D. Influenza virus
E. Rubella virus

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