通信英语I 单项选择1． 抽样频率a
sampling rate b
repetition rate c
sampling frequency答案：c2． 数字通信a
digital communication b
digital transmission c
transmission path答案：a3． 帧格式a
synchronization word b
frame format c
reverse operation答案：b4． 噪声功率a
noisy environment b
signal levels c
noise power答案：c5． 含噪声的环境a
signal levels b
noisy environment c
noise power答案：b6． 模拟信号a
speech channel b
analog signal c
amplitude value答案：b7． 脉冲流 a
stream of pulses b
receiving terminal c
terrestrial system答案：a8． 传播路由a
transmission path b
transmission quality c
binary transmission答案：a9． 互联网a
network resource b
Internet c
interconnected systems答案：b10．命令a
copy b
host c
command答案：c11．拷贝a
address b
mouse c
copy答案：c12．搜索工具a
user interface b
searching tools c
electronic mail答案：b13．存取 a
access b
