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【判断题】
非正弦周期电路的平均功率等于各个分量（含直流和交流）单独作用所产生的平均功率之和，即【图片】。A.
正确
B.
错误
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【单选题】What is the primary purpose of PepsiCo ’ s s ustainable a griculture s upport p olicy ?
A.
T o secure their supply chain into the future;
B.
To fulfill the company ’ s social responsibility;
C.
To gain good reputation for the company;
【单选题】The number of "Quayle in 96" buttons demanded on a certain university campus is given by D(p) = 100-p; where p is the price of buttons measured in pennies. The supply function is S(p) = p. The current...
A.
an increase of $5.50.
B.
an increase of $3.50.
C.
no change
D.
a decrease of $3.50.
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