按信道上信号的传输方向与时间的关系，通信方式可分为
A. 单工通信
B. 半双工通信
C. 全双工通信
查看答案
计算机中的数据分为模拟数据和数字数据。
A. 对
B. 错
What kind of holidays do they like?Watch Part 1 of the podcast and check the things you hear.
A. adventure holidays
B. beach holidays
C. city breaks
D. camping
E. reading books
F. wonderful nightlife
G. activity holidays
H. dancing
I. swimming
J. skiing
K. relaxing holidays
L. eating seafood
M. shopping
N. going to an amusement park
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