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?