题目

第三部分 阅读理解(共15小题;每小题2分,满分30分)    阅读下列短文,从每题所给的四个选项(A、B、C、D)中，选出最佳选项。并在答题卡上将该项涂黑。 A Each time I see a balloon, my mind flies back to a memory of when I was a six-year-old girl. It was a rainy Sunday and my father died. I asked my mom if Dad had gone to heaven. “Yes, honey. Of course,” she said. “Can we write him a letter?” She paused, the longest pause of my short life, and answered, “Yes.” My heart jumped. “How? Does the mailman go there?” I asked. “No, but I h下面哪种做法是为了减小摩擦？（　　）A．在鞋底、轮胎上刻有凹凸不平的花纹B．下雨天在泥泞的路面上撒些炉渣或沙子C．用滚动摩擦代替滑动摩擦D．增大压力和增大接触面之间的粗糙程度