题目内容

2.Why can a great variety of goods and services be created in the process of importing and exporting?

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3.Why can plants also benefit from international trade?

4.What does comparative advantage refer to?

5. Who would benefit from international trade?

当加计数器输入电路CU由断开到接通，复位输入电路R为1时，计数器的当前值加1。

A. 对
B. 错