题目

一元二次方程2x2=1－3x化成ax2+bx+c=0的形式后，a、b、c的值分别为……(     )                                                             A．2，1，－3B．2，3，－1C．2，3，1D．2，1，3 答案：B解析:p;【解析】略（2014年山东日照市高三校际联合检测）9．He didn’t tell his wife about buying a new car for her_____he could give her a big surprise on her birthday．A．so thatB．even thoughC．as ifD．in case