题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。Often, when he came to visit, my grandfather would bring me a present. These were never the sorts of things that other people brought, such as dolls, books or toys. My dolls and toys have been gone for more than half a century, but many of my grandfather's gifts are still with me. Once he brought me a little plastic cup. I looked inside, expecting to see something special. But there was only some loose soil in it, which made me disappointed. He smiled at me affectionately. Turning aro圆锥的轴截面是一个边长为10cm的正三角形，则这个圆锥面的侧面积为 cm2，高为 cm．