问题
选择题
It's _______ fine weather. Why _______ out for a walk? The air is nice and clean outside. [ ]
A. such a, don't go
B. so, not go
C. such, not go
D. so a, not to go
答案
答案：C
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It's _______ fine weather. Why _______ out for a walk? The air is nice and clean outside. [ ]
A. such a, don't go
B. so, not go
C. such, not go
D. so a, not to go
答案：C
，试计算时域均衡器输出y(t)的样值y0，y+1，y-1分别为多少？