冷菜易引起食物中毒的原因包括()
A.营养丰富
B.水分含量高
C.与工具、容器和操作人员的手接触机会多
D.食用前不再有加热杀灭细菌的机会
参考答案:B, C, D
空间滤波系统
—What's the population of China?
— . [ ]
A. They are many
B. It's many
C. It's small
D. It's large