","gnid":"9422e6f1ee363ab24","img_data":{"flag":1,"img":["https://p0.ssl.img.360kuai.com/t015d8841a5eb44dc2a.jpg"]},"op_ext":{"clist":"P01231103146f6d","index":"378","money_topic":{"clist":"P01231103146f6d","index":"378"}},"original":0,"paid":"2","pat":"art_src_1,fts0,sts0","powerby":"pika","pub_time":1711100576000,"pure":"","rawurl":"http://zm.news.so.com/d20b1aeadc849da42ccd7b3e74f583d0","redirect":0,"rptid":"93b41610b512d480","rss_ext":[],"s":"t","src":"书旗小说","store_s":"xs","tag":[{"clk":"kstory_1:雷总","k":"雷总","u":""}],"title":"第三百七十八章挽救秦紫萱

逄树飘4782设计了佛罗伦萨主教堂的屋顶 - 上学吧普法考试
阚力牵13399938456 ______[答案] 物体做竖直下抛运动,v0=2m/s,H=20m v^2-v0^2=2gH 物块到达地面的速度 v = √(v0^2+2gH) = √(2^2+2*10*20) = 2√101 m/s