【简答题】GSM 900M全速率系统载频带宽为(),一个载频可带有()个物理信道,其调制技术采用(),话音编码采用(),空中接口数据的传输速率为()。
【多选题】按照规划所涉及的行政级别和地理范围划分,物流系统规划设计的内容有( )。
【简答题】频分多址发FDMA把GSM900频段内25MHz带宽按频道间隔()Hz划分为()个频道,频道的中心载频称为频点,实际使用为()个,最后一个频点作为与其它通信系统的隔离带而不用。
【简答题】The Chinese ________ suit is a uniform that Dr. Sun Yat-sen liked to wear and recommended to the people of the country to wear.
【简答题】用所给词的适当形式填空。 1. Chinese people are very ______ (friend). 2. The girls enjoy______ (wear) beautiful clothes. 3. I hope the______ (begin) of our class is happy. 4. I like my job, because it's ______ (re...
【多选题】How do Chinese people celebrate spring festival?
B.
set firecrackers and fireworks
D.
visit relatives and give gift money