题目内容
从香农公式可以得到结论：当信道带宽趋于无穷大时，信道容量也趋于无穷大。
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信道容量指的是信道能容纳信息量的多少。
设一幅黑白数字相片有400万个像素，每个像素有16个亮度等级。若用3kHz带宽的信道传输，且信号噪声功率比等于20dB。试问需要传输多长时间（单位：秒）？
下列关于香农公式的重要结论描述不正确的是（ ）。
Task 1 Questions 1-7Reading Passage A has eight paragraphs,A-H Choose the correct heading for paragraphs B-H from the list of headings below. Write the correct number,i-ix.List of Headings i benefit of good interpersonal relationship ii a perfect recipe for happiness iii comparison with the people nearby iv hard but happy life v a question without definite answer vi positive aspect of the strict law vii a densely populated and happy country viii pose a question ix the measures of the government1 Paragraph B 2 Paragraph C 3 Paragraph D 4 Paragraph E 5 Paragraph F 6 Paragraph G 7 Paragraph H
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