Microwavesthattransmittelevisionsignalsalwaystravelinastraightline.Becausetheearthisrounditisimpossibletosendtelevisionsignalsoveralongdistance.Forexampleifwetriedtosendtelevisionsignalsdirectlyf
<p>问题：Microwavesthattransmittelevisionsignalsalwaystravelinastraightline.Becausetheearthisrounditisimpossibletosendtelevisionsignalsoveralongdistance.Forexampleifwetriedtosendtelevisionsignalsdirectlyf<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">李连友的回答：<div class="content-b">网友采纳 答案：DCBA提示：1．参见文章第一句。2．Ifwewanttosendtelevisionsignalsaroundthesurfaceoftheearthwemustsendthemfrompointtopointbytherelaysystem.Onlandwecansetup...
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