集成运算放大电路是一种采用 耦合方式的放大电路，因此低频性能 ，最常见的问题是 。
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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。( )
A. 对
B. 错
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.
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