在Rt△ABC中,∠ACB=90°,sinA=255,则tan2B等于( )
根据句意及首字母提示完成单词。(1)S____ is my aunt, Ms Jones.(2)Your pencil is h ____. His pencil is over there.(3)Is that her family p____ ? It's very nice.(4)Mr Green is not my u____ . He is my father.(5)This is Mrs Brown's d____ , Gina.
排序并填表.
红旗小学四(一)班和四(二)班比赛100米短跑,规定三盘两胜为胜.
(一)班跑得快的是小张、小明、小兰.分别为9.2秒、9.5秒、9.9秒;
(二)班跑得快的是为小刚、小强、小红,分别为9.3秒、9.5秒、9.7秒.如果(二)班要胜(一)班(二)班应该如何派出选手?