单选题
All of the following are correct with regard to quotas and tariffs except that
A、
a quota is a quantitative restriction on the quantity imported, while a tariff is a tax on imports.
B、
both tariffs and quotas raise the price of products.
C、
both tariffs and quotas are used to protect domestic industries.
D、
a tariff has the same economic impact as a quota.
【正确答案】
D
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