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【简答题】
非线性失真是指正弦波信号通过某电路后输出的波形中除包含原基波分量外,还含有其他( )分量,相对波形产生了畸变。
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皮皮学刷刷变学霸
举一反三
【单选题】Small cars are _____ of fuel, so they have more appeal for consumers. [ ]
A.
free
B.
short
C.
typical
D.
economical
【单选题】Why does Nigeria face chronic fuel shortages?
A.
Because the government sells most of the oil abroad.
B.
Because the country faces chronic difficulties in its oil production.
C.
Because the oil price is too low.
D.
Because the oil price is increasing.
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