题目

Check Engine Light      As I turned from the parking lot, heading for home, I noticed a yellow light on my dashboard(仪表板)had come on. The symbol indicated that I was to  41   the engine. I noted the water temperature and the oil light quickly to see  42  there were problems that would   43  an overheated engine. Noticing these two gauges (仪表) were okay, I  44  I could ignore the little yellow light that caused such great  45   for at least the moment. After I reread my owner manual(用户手册), I   46  the check engine light comes on to indicate that the若圆锥的底面半径为3，母线长为6，则圆锥的侧面积等于_____．