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【判断题】
若某系统的系统函数的极点全部位于右半平面,则该系统是不稳定的。A.
正确
B.
错误
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【单选题】Which of the following statements is NOT correct?
A.
A favorable balance of trade is known as a trade surplus and consists of exporting more than is imported.
B.
The balance of trade is an important part of the current account of a nation's balance of payment.
C.
Since 1994, China has maintained favorable trade balance for 15 years in succession.
D.
Since the mid-1980s, the United States has had a growing surplus in tradeable goods, especially with Asian nations(China and Japan).
【简答题】The North-South Conflict The North-South conflict derives its name from the fact that, almost without exception, the wealthy nations of the world are in the Northern Hemisphere and the poorer n...
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