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82.答案d.交叉反应在做玻片凝集试验时是经常发生的,因此在解释结果时必须考虑到.立克次氏体抗原同变形杆菌ox-19,土拉菌和布氏杆菌的交叉反应就是典型的例子.83.答案e.补体是一组可以增强抗体防御机能的糖蛋白.它存在于新鲜血清中,由C_1~C_99个成份组成.补体的经典激活途径为抗原抗体复合
82. Answer d. Cross-reactivity often occurs during slide agglutination tests and therefore must be taken into account in the interpretation of the results Cross-reactions of rickettsial antigens with Proteus ox-19, Tulara and Brucella Is a classic example.83. E. Complement is a group of glycoproteins that enhances the defense function of antibodies. It is present in fresh serum and is composed of C_1-C_99 components. The classical pathway of complement activation is antigen-antibody complex