刘嘉欣回答:
描写了春天的景色,抒发了作者对春的喜爱.
查看更多
设A={a,b,c,d},R={(A,B),(B,A),(B,C),(C,D)}求R的各次幂,并用关系矩阵表示.
1.Theexamwasveryeasy,wasnotit?yes,butIdonotthink____couldpassitA,somebodyB,anybodyC,nobodyD,ererybody2.Lookatmycup,it______paperA,makesB,madeC.isdonewithD,ismadeof3.Ishallletthemlivebuttheymustdrinkcoffeeorteato