The economists think the profit opportunities are rare because
A. the market is not efficient.
B. too many people go for it.
C. the prices are always fluctuating.
D. few people have the clear insights,
第8题
已知,,其中F1(jω)的最高频率分量为ω1,F2(jω)的最高频率分量为ω2,且ω2﹥ω1,现对组合信号进行冲激抽样,得到fs(t)。为满足抽样定理,问所需的最小抽样频率为多少?
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