出口玩具的发货人应在货物装运前7天向检验检疫机构报检，出口玩具必须逐批实施检验，检验不合格的不准出口。
参考答案：对
维系蛋白质一级结构的化学键是
A．氢键
B．疏水键
C．盐键
D．肽键
E．范德华力
In many industries, consumers return products for warranty repair, replacement, or recycling. （）will become more important as customers demand more flexible and favorable return policies.
A.Parts service
B.Reverse distribution
C.Reverse transportation
D.International logistics
