小明要去北京旅游应该带哪种地图（　　）

读等高线局部图，图中陡崖最高处的数值为

    Picture this scene. You wake up on a school morning, and you know you're 1. Maybe your throat is sore. Maybe your head hurts. Whatever the 2 is, your mum or your dad sends you back to bed to rest. This 3 to every kid once in a while, right?

    Wrong. And the living proof (证据) is eighteen-year-old Travis Schmidt. From his first day of kindergarten (幼儿园) to his last day of high school, Travis 4 stayed home sick. At first, Travis didn't think too much about never being absent (缺席的). But then he reached third grade with perfect attendance (出勤率). At that point, Travis decided to see how 5 he could keep it up.

    So how did Travis successfully keep 13 years of perfect attendance? In the first place, he's a very heathy kid. Although he got colds like everyone else, Travis never felt sick enough to stay home. Travis also 6 ahead (提前地). For example, he knew he'd 7 get chickenpox (水痘) sooner or later. So when a friend caught chickenpox one summer, Travis made sure to 8 him. A few days later, he was covered with poxes. But he had quite a lot of 9 to get better before school started in autumn.

    Travis is 10 his record. "I may not be the smartest or the coolest. But I'm always there," he says.

一个扇形的圆心角为60°，它所对的弧长为2πcm，则这个扇形的半径为____ cm．