Which of following can cause the great variation of influenza virus and wide epidemic:()
A. gene reassortment
B. gene recombination
C. transduction
D. transformation
E. conjunction
查看答案
which is not the steps of virus replication?()
A. attachment
B. penetration
C. uncoating
D. binary fission
E. release
which one is the most important maker of HBV infection?()
A. HBsAg
B. HBsAb
C. HBcAb
D. HBeAb
E. HbeAg
Which one of following is most accurate?()
A. HCV is transmitted through blood,but HDV not
Both HBV and HCV can establish a chronic carrier state
C. There is an effective vaccine against HCV but not against HDV
D. Both HCV and HDV are defective virus
E. Both HCV and HDV can be cultured artifially
which virus often cause ARDS (acute respiratory distress syndrome )?()
A. Rubella virus
B. Measles virus
C. HIV
D. rhinoviruses
E. SARS Coronavirus
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