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【简答题】
分子式为 C 6 H 4 Br 2 的 A ,以混酸硝化,只得到一种一硝基产物,推断 A 的结构。
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【简答题】蛋白质的基本构件分子是20种常见的______，除______是α-亚氨基酸外，其余均为______。
【判断题】The production of goods to produce other goods may also be considered as investing.
A.
正确
B.
错误
【判断题】According to the comparative cost theory, countries should specialize in the production of goods and services that can produce most efficiently. A country is said to have a comparative advantage in th...
A.
正确
B.
错误
【单选题】Production of goods and services has become globalized to a large extent as a result of
A.
natural resources being depleted in one country after another.
B.
skilled labor being highly mobile.
C.
multinational corporations' efforts to source inputs and locate production anywhere where costs are lower and profits higher.
D.
common tastes worldwide for the same goods and services.
相关题目：
【判断题】The production of goods to produce other goods may also be considered as investing.
A.
正确
B.
错误