![before,discover,fast,in,come,watch,so,fastit,ago,shine,...]( "before,discover,fast,in,come,watch,so,fastit,ago,shine,...")
- 问题详情：before,discover,fast,in,come,watch,so,fastit,ago,shine,notcanLighttravelsataspeed(速度)whichisaboutamilliontimes1.________thanthatofsound. 2.________onesecond,lighttravelsabout300,000kilometers,butsoundtravelsonly340meters.Youcangetsomeideao...
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