补体
A.是一组具有酶活性的脂类物质B.参与免疫病理C.对热稳定D.具有溶菌作用,但无炎介质作用E.C:在血清中含量最高
参考答案:B
She was complaining that the doctor was________too much for the treatment he was giving her.[ ]
A. spending
B. offering
C. costing
D. charging
硫印的原理是什么?硫印的目的是什么?并写出反应方程式。