缺陷病毒的产生是指 ()
A. 基因的缺陷
B. 刺突的缺陷
C. 包膜的缺陷
D. 衣壳的缺陷
E. 以上均不是
Which of the following virus don't cause viremia()
A. poliovirus
B. encephalitis B virus
C. influenza virus
D. Varicella-Zoster virus
E. none of the above
Which of the following is false about interferon? ()
A. act directly on virus
B. broad-spectrum antiviral activity
C. host species specific
D. non-specific anti-viral immunity
E. none of the above
Which of the following descriptions of inclusion body is false? ()
A. specific formation of inclusion body
B. meaningful to diagnose virus infection
C. nonspecific formation of inclusion body
D. some bacteria infection can cause inclusion body formation
E. none of the above
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