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【单选题】
Which of the following is wrong about quota? Licensing of foreign trade is closely related to quantitative restrictions — quotas — on imports and exports of certain goods. A quota is a limitation in value or in physical terms, imposed on import and export of certain goods for a certain period of time.A.
It is a kind of quantitative restrictions on imports and exports of certain goods.
B.
It is a limitation in value or in physical terms.
C.
It is a kind of license for import and export commodities.
D.
It is imposed on import and export of certain goods for a certain period of time.
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【简答题】食品安全是对食品按其原定用途进行制作和食用时 一种担保。
【多选题】用联系的、发展的观点看问题，()。
A.
是马克思主义科学世界观的一个基本原则
B.
要求我们必须确立辩证的思维方法
C.
关键是要掌握唯物辩证法关于联系、发展和矛盾的观点
D.
是科学的实践观的内在要求。