【简答题】将下列短文译成中文: The unit which performs the pulse code modulation and demodulation of the signals in a digital transmission system is called a coder-decoder, or in abbreviated form, a codec. In early digit...
【简答题】Normally a business letter consists of ______parts and _______ parts. Business letters usually have ________giving information about the company. The ____ is mostly written below the letterhead and sh...
【简答题】“Great Britain” is the collective name for the three countries of England, Scotland and _____. 2. The name of the British National Anthem is _____. 3. “ ” is the abbreviated form for the official name...