park,see,lot,can,signs,a,he,in,of,the,public(.)连词成句
快,100分啊五组数,①25,7,24.②16,20,12③9,40,41,④4,6,8⑤3²,4²,5²,以各组数为边长,能组成直角三角形的个数
当x为正整数时,x的n次方的个位数随n的变化(1)数0,1,5,6周期为1;4,9的周期为2;2,3,7,8的周期为4.(2)x²的末位数(x²)=0,1,4,5,6,9(3)(x四次方)=0,1,5,6(4)(x(x+1)=0,2,6(5)(x的4n+9