分解因式:3x3﹣12x2y+12xy2= [ ]
A.3x2(x﹣4y)+12xy2
B.3x(x2﹣4xy+4y2)
C.3x(x﹣2y)2
D.不能分解
答案:C
The trouble is _____ we are short of hands.
A.what
B.that
C.how
D.why
急性肾衰少尿期的主要功能代谢变化有_____、_____、_____、_____、_____。该期患者死亡率高,最常见的病因是_____。