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【简答题】
香农定律关于信道噪声的主要结论是: 对于有随机热噪声的信道,如果信道带宽为B(Hz),信噪比为S/N,则最大数据传输速率为B*log2(1+S/N ) b/s。电话系统的典型参数是信道带宽为3000Hz,信噪比为30dB,那么不管使用多少信号电平级,也不管采用多大的采样频率,决不能以大于多少的速率传输数据?
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举一反三
【单选题】Which statement about the external environment and employment is true?
A.
External environmental conditions improve employment during upswings and worsen employment during downturns.
B.
External environmental conditions worsen employment during upswings and improve employment during downturns.
C.
External environmental conditions have no effect on employment during upswings and worsen employment during downturns.
D.
External environmental conditions worsen employment during upswings and have no effect on employment during downturns.
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【单选题】侯女士,32岁,诊断为甲亢。护士清晨测得患者的脉搏96/rain,血压130/70mmH9,计算其基础代谢率应属于
A.
正常
B.
正常范围偏高
C.
重度甲亢
D.
中度甲亢
E.
轻度甲亢
查看完整题目与答案
【简答题】When will the employment begin?
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【单选题】侯女士，32岁，诊断为甲亢。护士清晨测得患者的脉搏96次／min血压130／70mmHg，计算其基础代谢率应属于
A.
正常
B.
正常范围偏高
C.
重度甲亢
D.
中度甲亢
E.
轻度甲亢
查看完整题目与答案
【单选题】China's employment and re-employment situation remains tough with a surge this year in the number of graduates hitting the job market and in unemployment in general, a senior official said. The countr...
A.
Tough Year for Job Seekers
B.
College Graduates Challenged by Employment
C.
Too Many Workers Laid Off This Year
D.
Minister Hopeful of Employment Prospective
查看完整题目与答案
【单选题】侯女士,32岁,诊断为甲亢。护士清晨测得患者的脉搏96/min,血压130/70mmHg,计算其基础代谢率应属于
A.
正常
B.
正常范围偏高
C.
重度甲亢
D.
中度甲亢
E.
轻度甲亢
查看完整题目与答案
【多选题】下列 不属于 还原反应的类型是:
A.
酯裂解
B.
硝基和偶氮还原
C.
醌还原
D.
脱卤反应
E.
水解反应
查看完整题目与答案
【单选题】China's employment and re-employment situation remains tough with a surge this year in the number of graduates hitting the job market and in unemployment in general, a senior official said. The countr...
A.
Tough Year for Job Seekers.
B.
College' Graduates Challenged by Employment.
C.
Too Many Workers Laid Off This Year.
D.
Minister Hopeful of Employment Prospective.
查看完整题目与答案
【简答题】due to expiry of employment
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【单选题】China's employment and re-employment situation remains tough with a surge this year in the number of graduates hitting the job market and in unemployment in general, a senior official said. The countr...
A.
Tough Year for Job Seekers
B.
College Graduates Challenged by Employment
C.
Too Many Workers Laid Off This Year
D.
Minister Hopeful of Employment Prospective
查看完整题目与答案
相关题目：
【单选题】Which statement about the external environment and employment is true?
A.
External environmental conditions improve employment during upswings and worsen employment during downturns.
B.
External environmental conditions worsen employment during upswings and improve employment during downturns.
C.
External environmental conditions have no effect on employment during upswings and worsen employment during downturns.
D.
External environmental conditions worsen employment during upswings and have no effect on employment during downturns.
查看完整题目与答案
【单选题】侯女士,32岁,诊断为甲亢。护士清晨测得患者的脉搏96/rain,血压130/70mmH9,计算其基础代谢率应属于
A.
正常
B.
正常范围偏高
C.
重度甲亢
D.
中度甲亢
E.
轻度甲亢
查看完整题目与答案
【简答题】When will the employment begin?
查看完整题目与答案
【单选题】侯女士，32岁，诊断为甲亢。护士清晨测得患者的脉搏96次／min血压130／70mmHg，计算其基础代谢率应属于
A.
正常
B.
正常范围偏高
C.
重度甲亢
D.
中度甲亢
E.
轻度甲亢
查看完整题目与答案
【单选题】China's employment and re-employment situation remains tough with a surge this year in the number of graduates hitting the job market and in unemployment in general, a senior official said. The countr...
A.
Tough Year for Job Seekers
B.
College Graduates Challenged by Employment
C.
Too Many Workers Laid Off This Year
D.
Minister Hopeful of Employment Prospective
查看完整题目与答案
【单选题】侯女士,32岁,诊断为甲亢。护士清晨测得患者的脉搏96/min,血压130/70mmHg,计算其基础代谢率应属于
A.
正常
B.
正常范围偏高
C.
重度甲亢
D.
中度甲亢
E.
轻度甲亢
查看完整题目与答案
【多选题】下列 不属于 还原反应的类型是:
A.
酯裂解
B.
硝基和偶氮还原
C.
醌还原
D.
脱卤反应
E.
水解反应
查看完整题目与答案
【单选题】China's employment and re-employment situation remains tough with a surge this year in the number of graduates hitting the job market and in unemployment in general, a senior official said. The countr...
A.
Tough Year for Job Seekers.
B.
College' Graduates Challenged by Employment.
C.
Too Many Workers Laid Off This Year.
D.
Minister Hopeful of Employment Prospective.
查看完整题目与答案
【简答题】due to expiry of employment
查看完整题目与答案
【单选题】China's employment and re-employment situation remains tough with a surge this year in the number of graduates hitting the job market and in unemployment in general, a senior official said. The countr...
A.
Tough Year for Job Seekers
B.
College Graduates Challenged by Employment
C.
Too Many Workers Laid Off This Year
D.
Minister Hopeful of Employment Prospective
查看完整题目与答案