如图化简|a+c|-|b|+|b-a|___b___________0____________a__c____→意思是c＞0 a＞0 b＜0 c＞0急

b a _ _ _ _ c k 中间应该填什么?b a _ _ _ _ c k中间应该填什么? ·已知实数a,b,c满足a=6-b,c2=ab-9,则a=_,b=_,c=_ 已知实数a,b,c满足a=6-b,c2=ab-9,则a=_,b=_,c=_ 若三角形ABC的周长为18cm且a+b=2c,b=2a,则a=_,b=_,c=_. A:_ _ the farmers!What are they doing?B:Are they seeds?C:Yes,_ _. 2,3a.b >_^ 第三题a b c d分别解释.>_ (a-b)-(c+d)去括号形式详细原因%>_ Everything well go _.A.good B.nice C.OK It‘s _ today A.well B.fine c.It‘s _ today A.well B.fine c.find Is this _ card?yes _ card is tom`s 选择:A.a;the B.a;A C.the;A 已知质数a,b,c,满足（a+b）×（c-b）,则a=_,b=_.求求 急 在平行四边形ABCD中,若角A—角B=70度,则角A=_,角B=_,角C=_,角D=_ 已知三个数a,b,c满足|a|+a=0,|ab|=ab,|c|_c=0化简|b|_|c_b|_|a+b|+|a_c| 1._ dictionary is _ important school thingA.the;a B.a;an C.the;an D.a;a 理由！ They are _ the woods.They are _ the woods. A.in B.on C.at 若a＜b＜0＜c,那么-|a|_|b| Y=(A+C)(A'+B+C')(A'+B'+C)逻辑函数化为或非_或非的形式