A moreover B therefore C but D nevertheless

There was no news ;____,she did not give pu hope
A moreover B therefore C but D nevertheless
请详解
能选B吗

-(a+b)+(a-b) a++&&b++ a,a,b,b,a,a,b,b.....通项 化简：|a-b|-|b| a*a+3b*b≥2b(a+b) |a+b|-|a|-|a-b| 化简 |a|-|a-b|+|a+b|=? a#define max(a,b) ((a) > (b) ? (a) : (b)) 初一数学题..(a+b)(a-b)+c(a+b)为什么=(a+b)(a-b+c) 已知a<b<0则1.ab( )0 2. a×a×b×b×b( )03.a×a( )b×b 4. a×a×a( )b×b×b