属于腐败菌，在罐头食品中比较常见的是（）
A.弧菌属
B.梭菌属
C.志贺氏菌属
D.葡萄球菌属
E.乳杆菌属
参考答案：B
Could you tell us _____ happens when one student in class expresses a personal opinion ______
maybe upsets other students?[ ]
A. that; that
B. what; where
C. that; where
D. what; that
