动脉壁薄腔大，富有弹性，而静脉壁厚腔小，有丰富的瓣膜配布（ ）
参考答案：错
Actually,you can be _________ you want to be,a scientist,a doctor,an astronaut or a manager so long as you set your mind to it.
A．whatever
B．whoever
C．whomever
D．whichever
在服务礼仪中，规范化服务的主要含义是什么？
