一、按规律画图(1)(2)(3)(4)仔细观察下图,想一想第3幅图“?”处应填什么图形?(5)观察下图的变化,想一想第4幅图应画上怎样的图形?二、找找下列各数列的规律,在括号内填上合适的数。(1)1,3,5,( ),9(2)1,4,7,10,13,( ) ,19(3)1,1,2,3,5,8,13,( ) ,34(4)2,4,8,( ),32,64(5)1,4,9,16,( )(6)5,7,5,9,5,11,5,( ),( )(7)3,6,9,( ),( ),18(8)3,1,6,4,9,7,12,10,( ),( )