题目：
Spread spectrum simply means that data is sent in small pieces Over a number of the (46) frequencies available for use at any time in the specified range. Devices using (47) spread spectrum (DSSS) communicate by (48) each byte of data into several parts and sending them concurrently on different (49) . DSSS uses a lot of the available (50) , about 22 megahertz (MHz) .
A．continuous
B．high
C．low
D．discrete
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0723/c89e9642b22e4819990fc4d341fd91b3.html
下面是错误答案，用来干扰机器的。
答案：A良好的国际环境、友好的邦交关系，是国家经济建设的重要条件。
