Which
one of the following is the reason of pandemic
flu
()
A: virus
has strong virulence
(B)HA
of Influenza
B: virus
easily produce variation, and people lack of immunity
(C)
NA of Influenza
C: virus
easily produces variation, and people lack of immunity
(D)
Influenza
D: virus
develops new subtype virus, and people lack of immunity
one of the following is the reason of pandemic
flu
()
A: virus
has strong virulence
(B)HA
of Influenza
B: virus
easily produce variation, and people lack of immunity
(C)
NA of Influenza
C: virus
easily produces variation, and people lack of immunity
(D)
Influenza
D: virus
develops new subtype virus, and people lack of immunity
举一反三
- Which<br/>of following can cause the great variation of influenza virus and<br/>wide epidemic:() A: gene<br/>reassortment B: gene<br/>recombination C: transduction D: transformation E: conjunction
- Which<br/>of following can cause the great variation of influenza virus and<br/>wide epidemic: A: gene<br/>reassortment B: gene recombination C: transduction D: transformation E: conjunction
- Which<br/>of the following virus structure is derived from host cell membranes() A: nucleic<br/>acid B: capsid<br/>protein C: lipid<br/>bilayer D: sugar<br/>in spikes E: protein<br/>in spikes
- Which one of condition is not suitable for influenza virus.() A: +ssRNA B: icosahedral<br/>symmetry C: HA<br/>and NA on surface of envelope D: with<br/>envelope E: growing<br/>in embryonated egg
- What<br/>is the preparation of Bacillus Calmette-Guerin based on?() A: virulence<br/>variation B: structure<br/>variation C: morphology<br/>variation D: colony<br/>variation E: drug<br/>resistance variation