一个理想对称的差动放大电路，只能放大差模输入信号，不能放大共模输入信号。( )
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Which one is the direct examination of bacterial shape in the clinical specimens of patients?
A. cultivation in medium;
B. Staining for microscopic examination,
C. Biochemical test,
D. detection of antibody;
Which method is not right about collection of clinical specimen for diagnosis of bacterial infection?
A. Specimens stained for microbiologic examination.
B. Avoid specimen contamination during collection.
C. The specimen must be taken to the lab for examination promptly.
D. Specimens should be collected after the administration of antibiotics
The purpose to inoculate the clinical specimen collected from patient on solid medium for cultivation is ____.
A. Observe the shape of bacteria;
B. Observe biochemical reaction
C. Isolation of colony for pure culture
D. Observation of special structures.
Which test can determine bacteria with a specific ability to degrade amino acid, cysteine?
A. Urea Hydrolysis Test,
B. H2S Production test
C. Methyl Red test,
D. Sugar Fermentation Tests.
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