2. 外语
  3. A、Microwaves are strange electric waves. B、Microwaves travel in straight lines and do not follow the curve of the earth’s surfac

A、Microwaves are strange electric waves. B、Microwaves travel in straight lines and do not follow the curve of the earth’s surfac

admin2013-06-03  90
问题  
选项 A、Microwaves are strange electric waves.
B、Microwaves travel in straight lines and do not follow the curve of the earth’s surface.
C、There are not any wires to send microwaves.
D、We must amplify microwaves in relay stations.
答案B
解析
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大学英语四级

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