14.3.1 提公因式法.精心选一选[来源:学科网]1.下列各式从左到右的变形中，是因式分解的是（ ）。A.(x+3)(x-3)=x²-9 B.x²+1=x(x+x1)C.3x²-3x+1=3x(x-1)+1   D.a²-2ab+b²=(a-b)²2多项式-...

 

第四章 小结与复习 一、选择题 1．下列式子是方程的是    (    ) A．1＋2＋3＋4＝0                     B．2x－3 C．x＝1                    ...

A. even B. tradition C. rarely D. well-known E. trainingQueen Elizabeth II had a real love for animals. Her favourite pets are corgis (柯基犬) and horses. As a _____1_____, corgis ...