题型:选择题 抛物线y=ax2(a>0)与直线y=kx+b(k≠0)有两个公共点,其横坐标分别是x1,x2;而直线y=kx+b与x轴焦点的横坐标是x3,则x1,x2,x3之间的关系是( )A.x3=x1+x2B.x3=1x1+1x2C.x1x3=x1x2+x2x3D.x1x2=x1x3+x2x3 查看答案
题型:选择题 The house was too expelsive and too big. _____, I'd grown fond of our little rented house. [ ]A. Besides B. Therefore C. Somehow D. Otherwise 查看答案