以下为消化道感染的常见病原菌，其中侵袭性强的是
A．金黄色葡萄球菌B．EIECC．FTECD．霍乱弧菌E．产气荚膜梭菌
参考答案：B
— Michael was late for Mr. Smith's oral class this morning.
— _________? As far as I know, he never came late to class.[ ]
A. How come
B. So what
C. Why not
D. Guess what
如果乳母食用去米汤的“捞饭”或精制米面会导致哪种营养素缺乏并波及婴儿（）。
A.维生素C
B.维生素A
C.维生素B1
D.维生素E
E.维生素D
