题目内容

HDV accomplishes its replication cycle with the help of ()

A. HAV
B. HBV
C. HCV
D. HEV
E. HIV

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The infection source of encephalitis B virus is ()

A. Young pigs
B. mosquitoes
C. louse
D. tick
E. mite

Which virus cause Varicella-Zoster? ()

A. HSV-1
B. HHV-6
CMV
D. HSV-2
E. VZV

The first use of vaccinia to prevent smallpox is ()

A. Koch
B. Levin Hook
C. Lister
D. Pasteur
Edward.Jenner

The measure unit of bacteria is? ()

A. mm
B. μm
C. nm
D. cm
E. non of the above