一个FM话音信号在频谱图上表现为?
参考答案：
一条稳定的垂直线，左右伴随一组对称的随语音出现和变化的垂直线
Dear students, please read every sentence carefully.
The more _____ you are, the ______ mistakes you'll make. [ ]
A. carefully; fewer
B. careful; less
C. careful; fewer
眼眶周围色黑者，多属（）。
A.肾虚水饮
B.肾阳虚
C.肾阴虚
D.血瘀
E.痛证
