题目

— Come on! I know you are good at playing the guitar.— Sorry. But I'm inbad mood today. A . / B . the C . a D . an 答案：C钟表的轴心到分针针端的长为5cm，那么经过40分钟，分针针端转过的弧长是（ ）A．cmB．cmC．cmD．cm