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。