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(一)在全身感染时,可出现哪类免疫球蛋白? A.IgA B.IgE C.IgG D.IgM(二)下列哪种微生物常与慢性支气管炎的发病过程相联系?
(A) what types of immunoglobulins may occur during systemic infection? A.IgA B.IgE C.IgG D.IgM (b) Which of the following microorganisms is often associated with the pathogenesis of chronic bronchitis?