细菌毒素中毒性作用最强的是（）
A.肉毒毒素
B.白喉外毒素
C.肠毒素
D.溶血毒素
E.内毒素
参考答案：A
—Will you please _______ it to me on Tuesday?
—What about Saturday? My computer doesn't work well these days. [ ]
A. post
B. give
C. email
D. bring
