A:①山谷②山脊③鞍部④山顶
B:①山谷②山谷③山顶④鞍部
C:①山谷②山脊③山顶④鞍部
D:①山脊②山脊③山顶④鞍部
二次函数y=(a2﹣4)x2+(a﹣2)x+a中,a的取值范围是____
(____)1.A.pen B. pencil C. to
(____)2.A. run B. in C. walk
(____)3.A.ruler B. crayon C. flower
(____)4.A.easy B. this C. that
(____)5.A.here B. there C. book