Write a letter to the president of your university to suggest that the electricity in the
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声音中的频率反映声音的音调，而振幅则反映声音的强弱。()
The figures in Paragraph 2 denote______.
A. China has the largest number of children with type 2 diabetes
B. Japan has the biggest growth rate in new cases of diabetes
C. Latin America sees the greatest rise in the disease
D. the increasing patterns are alike in many countries
MIDI文件比WAV文件的存储容量要小，因此MIDI文件的音质差。()
CD-ROM文件系统由逻辑格式、源文件、目的文件三个功能模块组成。()
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