由副溶血性弧菌中毒食物为
A．肉类
B．海产品
C．蔬菜类
D．菌类
E．谷类
参考答案：B
The postcard has a picture ____________ our school.
[ ]
A. in
B. at
C. of
应将油箱盖与加油管口紧密结合，保持（）畅通
