唾液对龋病有免疫作用，能使某些病原菌成为非病原菌是因为其含有_爱下问搜题

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问题单项选择题 A1/A2型题

唾液对龋病有免疫作用，能使某些病原菌成为非病原菌是因为其含有（）

A.变酶

B.唾液小体

C.氨盐和硫氰酸盐

D.分泌型免疫球蛋白A（SIgA.

E.溶菌酶

答案

参考答案：A

填空题

首字母填词。

1. He gave his daughter a large a______ of money.

2. Bread is baked in an o______.

3. You should a_____ some water to the soup.

4. We need two t_____ of honey.

5. How m______ yogurt do you want to buy?

名词解释

茹费理