关于beforediscoverfastin的百科

• 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...
• 2021-04-295788