单选题
The fact that it will never be possible to converse with someone on another planet shows that ______.
A、
certain universal laws cannot be prevailed against
B、
no object can ever travel faster than light
C、
western culture has a special idea of communication
D、
radio messages do not travel fast enough
【正确答案】
D
【答案解析】
从文中可以看出，从地球到火星通话有三分钟的时间间隔，这样就只是口头信息的交换而不是谈话。所以答案是D无线电讯传播的速度不够快。
提交答案
关闭