3 7 11 19 _____

A.1 2 3 3 4 5 _____ B.6 7 2 2 8 _____ C.7 2 10 _____ D.11 7 找规律 1,3,5,7,9,_____,...,_____,... 1,4,9,16,25,____,...,_____ 照规律填出下5个数 1,11,21,1211,111221,312211,_____,_____,_____,_____ Our first class begins at _____ _____ _____ _____.我们第一节课7：45 %>_____ _____, 一道数学题：已知：3a-b/3=2a+c/5=2b+c/7,则a：b：c=_____:_____:_____ 一元二次方程解法有（1）_____（2）_____（3）_____（4）_____（5）_____ 找规律填空,-4,7,-11,16,-22,_____,______ 计算:11/12-(5/12-1/7)=_____ 计算:3/14除以4/7=_____. 找规律：1 1 3 2 _____ 3 7 _____ 9 5 1 2 4 5 7 ____ 10 ____