填空题


What is impressive about the characteristic of digital radio

【参考答案】

It has no distortions
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单项选择题
Which of the following is within the capacity of the artificial nose being developed
A．Performing physical examinations.
B．Locating places which attract terrorists.
C．Detecting drugs and water contamination.
D．Monitoring food processing.
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A．notifiedB．observedC．commentedD．detected
A．notified
B．observed
C．commented
D．detected
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