进出口食品标签审核适用于对进出口（）食品标签审核、检验管理。
A.内包装
B.预包装
C.外包装
D.固定包装
参考答案：B
下列关于IgG的特性，正确的有()
A．可分四个亚类
B．大多数抗菌、抗毒素、抗病毒抗体属于IgG
C．能激活补体途径
D．能与SPA结合
E．是初次免疫应答产生的主要抗体
—Mike, I don’t know nice cartoon books.
—Why not go to the bookstore near my house? The books there are both cheap and nice.
A. where to buy B. what to buy C. when to buy
