题型:问答题 简答题 I haven't seen Sara since she was a girl, and she has changed beyond _____.[ ]A. hearing B. strength C. recognitionD. measure 查看答案
题型:问答题 简答题 已知函数y=3x2-ax+2a的图象与x轴相交于不同的两点A、B.(1)若A、B两点分别在直线x=1的两侧,求实数a的取值范围;(2)若A、B两点都在直线l:x=1的右侧,求实数a的取值范围. 查看答案