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【单选题】
设带通模拟信号的频带限制在fL和fH之间,信号带宽B=fL-fH,n为(fH/B)的整数部分,k为(fH/B)的小数部分,则根据抽样定理,则抽样频率fs必须满足A.
fs≥2B(1+k/n)
B.
fs≥B(1+k/n)
C.
fs≤2B(1+k/n)
D.
fs≤B(1+k/n)
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反馈参考答案：
举一反三
【判断题】The California Tarasoff case exemplifies the challenges providers face in protecting confidentiality. In that case a graduate student, Prosinjit Podder, disclosed to a counselor affiliated with Berkel...
A.
正确
B.
错误
【单选题】They sent the letter to me ___ mistake.
A.
by
B.
for
C.
with prefix="o" ns="urn:schemas-microsoft-com:office:office"? ?xml:namespace>
D.
of
【简答题】They sent the letter to me ___ mistake.
【单选题】What does the letter sent by European officials say?
A.
They will refer Iran to the UN Security Council.
B.
Any restart Uranium enrichment would end the talks.
C.
Britain would back the punitive measures.
D.
The US would go back the negotiations.
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