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单项选择题

方波的实现算法较简单,可以在一个周期的中间位置翻转电平即可。以下为源程序:

‌横线内容可以选择()。

A.if(address< =17’h0ffff)q_square< =12’h000;
B.if(address< =17’h0ffff)q_square< =12’hfff;
C.if(address==17’h0ffff)q_square< =12’h000;
D.if(address>=17’h0ffff)q_square< =12’hfff;

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