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。MyKindergarten HeroWehad just completed a unit on community heroes, and I had given my kindergartenclass a task to write or draw about their favorite hero. Each child was busycreating colorful masterpieces such as firefighters, policemen and doctors.Several students had chosen to draw larger-than-life brothers and sisters ormoms and dads. However,one little boy was having difficulty with the assignment. Cameron had touchedmy heart early in the school year. He had dark brown hair and w在正三棱柱ABC-A1B1C1中，侧棱长为，底面三角形的边长为1，则BC1与侧面ACC1A1所成的角是    ．