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【简答题】
设二进制数字传输系统每隔0.4ms发送一个码元。试求: (1)该系统的信息速率; (2)若改为传送十六进制信号码元,发送码元的间隔不变,则系统的信息速率变为多少?(设各码元独立等概率出现)
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【简答题】老字号广告语及推广
【单选题】According to STRESS IN MODERN LIFE of Text A in Unit 3, one can know that the more stress you are under, the better performance you'll have.
A.
True
B.
False
【单选题】In STRESS OF MODERN LIFE( Text A of Unit 3), the author thinks that tests may be the number one stressor for most college students.
A.
True
B.
False
【判断题】Due to the overabundance of stress in our modern lives, we usually think of stress as a positive experience, but from a biological point of view, stress can be a neutral, negative, or positive experie...
A.
正确
B.
错误
【单选题】(课文理解)The word "blackberry" in the text of Stress in Modern Life refers to____.
A.
a kind of fruit
B.
an addictive drug
C.
a commonly-used tool
D.
a kind of mobile phone
【简答题】Because of the stress and strains of modern life folks today would rather watch television than get together with neighbors. Their behavior doesn't mirror TV soaps like Coronation Street and East Ende...
【简答题】In the early 1990s , Madan Kataria , an Indian doctor who worked in Mumbai , became interested in the growing body of scientific evidence showing that laughter is extremely beneficial to human health....
【单选题】The word "blackberry" in the text of Stress in Modern Life refers to____.
A.
a kind of fruit
B.
an addictive drug
C.
a commonly-used tool
D.
a kind of mobile phone
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