每只出厂的液化石油气瓶，均应有（），每批出厂的液化石油瓶，均应附（）的复印件。
参考答案：产品合格证；有批量检验质量证明书
I want to go to a _____________ to buy something for my son.[ ]
A. toys shop
B. sports shop
C. shoe's shop
D. books shop
