题目

Ⅱ 语言知识及应用 (共两节，满分35分) 第一节 完形填空 (共10小题；每小题2分，满分20分) 阅读下面短文，掌握其大意，然后从21—30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 I was cleaning out an old box when an old card caught my eye: Queen City Casket Company. “What is it?” I wondered. I  21  it over. There, in faded ink, was a hand-scrawled(手写的)   22   . Immediately my mind traveled back many years. I was nine years old, walking down the cold, wet street of Springfield, with a bag 已知函数f（x）=x3+（a-1）x2+3x+b的图象与x轴有三个不同交点，且交点的横坐标分别可作为抛物线、双曲线、椭圆的离心率，则实数a的取值范围是    ．