导游人员按业务范围划分，可分哪几类?
参考答案：
海外领队、全程陪同导游员、地方陪同导游人员、景区(点)讲解员。
在二位三通式防滑阀中，三通是指阀分别与大气、制动储风缸、（）相通。
How do you do? Glad to meet you.（）
A.Fine. How are you?
B.How do you do? Glad to meet you, too.
C.How are you? Thank you!
D.Nice. How are you?
