题目内容

Which is not protective antibody of HBV? ()

A. anti-HBs
B. anti-HBe
C. anti-HBc
D. anti-preS1
E. anti-preS2

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A 3-year-old child presents at the physiciang office with symptoms of coryza, conjunctivitis, low-grade fever, and Koplik's spots. The causative agent of this disease belongs to which group of viral family()

Adenovirus
B. Herpesvirus
C. Picornavirus
D. Orthomyxovirus
E. measles virus

Measure unit of bacteria is ()

A. m
B. cm
C. mm
D. μ m
E. nm

What is the amount of AGAR in the semisolid medium? ()

A. 1%-1.5%
B. 0.3%-0.5%
C. 1.5%-2.5%
D. 4%-5%

The sequence of reagents used in gram staining is A:Crystal violet B:Gram’s iodine C:Ethanol, 95% D:Safranin solution ()

A-B-C-D
B-A-C-D
C. D-A-B-C
D-B-C-A