已知a-6=46,a÷6÷c=2,a÷6-c=12,求a+b的值。(15分)
1,2,2,6,3,15,3,21,4,() A.46;B.20;C.12;D.44;
:3,6,12,2l,33,()A.44 B.46 C.48D.50
:1,2,6,15,31,()A.46 B.61 C.66 D.56
1.2,6,15,31.()。A.46B.61C.66D. 52
1,2,6,15,31,()A.46 B.61 C.66 D.56
46.小儿发生生理性贫血的年龄是A.1个月内B.2~3个月C.6个月时D.1岁时E.12~18个月