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【简答题】
下面属于行运算的是( ) A. 选择运算 B.投影运算 C.笛卡儿积 D.等值连接
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举一反三
【简答题】World Trade Organization
【单选题】The World Trade Organization ________.
A.
advises developing countries on issues of trade barriers
B.
promotes long-term economic development and poverty reduction
C.
exists to help countries conduct trade through a system of rules
D.
facilitates trade among third-world countries and developed nations
【单选题】The World Trade Organization:
A.
oversees trade agreements.
B.
is an example of a trade agreement.
C.
includes all nations.
D.
was established before World War II.
【单选题】The World Trade Organization
A.
has the power to enforce the rules of international trade.
B.
covers agriculture and physical goods, but not services or intellectual property rights.
C.
recently expelled China for human rights violations.
D.
ruled that NAFTA is to be the model for world trade integration.
【简答题】草坪草的分枝类型有哪些?其特点各是什么?
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