As far as high-tech products are concerned, China mainly exports___ in recent years. Together they make up about 85 percent of China’s high-tech product exports at present（）
A. computers and communication products
B. electronic products
C. aerospace products
D. biotechnology and material technology products
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The major purpose of one country’s trade remedies is to protect its______（）
A. consumers’ interests
B. domestic industry
C. national security
D. export
The first step to process an analog signal digitally is to（）
A. encode it by using the binary coding scheme
B. quantize it in amplitude
C. sample it at discrete time instant
D. pass it through a D/A converte
In the context of digital image processing , description（）
A. is also referred to as representation
B. is also called feature extraction
C. involves extracting attributes that result in some quantitative information of interest
D. is the process of recognize Individual objects
The application areas of DSP include the following but（）
A. earthquake recording & analysis
B. cognitive science
C. echo reduction
D. simulation and modeling
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