题目内容

Virus can be observed through ()

A. light microscope
B. Eletron microscope
C. X-ray diffraction
D. centrifugation
E. none of the above

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Which of the following virus is complex symmetry ()

A. bacteriophage
B. herpesvirus
C. hantavirus
D. HIV
E. none of the above

Which of the following is non-structure protein ()

A. capsomere
B. early protein
C. envelope protein
D. spike
E. none of the above

Bacteria do not invade the bloodstream, only toxins invade the bloodstream ()

A. Septicemia
B. toxemia
C. bacteremia
D. Pyemia
E. none of the above

Which is not one of virulence factors in bacterial pathogenicity ()

Adhesin
B. Capsule
C. Exotoxin
D. Toxiod
E. none of the above