下列哪种药物为静脉扩张剂
A．硝普钠B．酚妥拉明C．氨氯地平D．肼苯哒嗪E．硝酸甘油
参考答案：E
The boy is Taotao. _______ mother is our English teacher. [ ]
A. His
B. Her
C. My
D. Your
洁净室（区）的清洁必须在工艺操作结束后才能进行。
