阅读理解Trainshavelongbeenanimportantformoftransportation.Yettheyhave……
<p>问题：阅读理解Trainshavelongbeenanimportantformoftransportation.Yettheyhave……<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">介孟恩的回答：<div class="content-b">网友采纳 Trainshavelongbeenanimportantformoftransportation.Yettheyhavechangedalotsince1804,whenthefirsttrainmovedat8km/hr.Today’shighspeedtrainscango300km/hrorfaster.Besides...
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