食品包装的作用包括（）.
A、保护食品
B、方便贮运
C、促进销售
D、提高商品价值
参考答案：A, B, C, D
Economy of the world in 2010 was not so good. Many small companies ______.[ ]
A. closed up
B. drew up
C. picked up
D. grew up
国家对列入目录的( )种入境进口制度民用商品实施验证。
A．62
B．61
C．63
D．64
