A:2020Ω
B:20Ω
C:2012Ω
D:2200Ω
一辆三轮车,前轮直径为3dm,后轮直径为2dm,前轮转50周所行的路程,后轮要转多少周?
①液氯 ② ③白磷 ④18O ⑤ ⑥红磷 ⑦16O ⑧氯气.
①“金沙水拍云崖暖,大渡桥横铁索寒”
②“钟山风雨起苍黄,百万雄师过大江”
③“秋收时节暮云愁,雳雳一声暴动”
④“浴血东瓜守,驱倭棠吉归”(注:东瓜和棠吉是缅甸城镇名称)
—That's ____. You can serve it on the food festival.