静脉尿路造影常用造影剂为（）
A.泛影钠
B.碘化油
C.泛影葡胺
D.硫酸钡
E.阿米培克
参考答案：C
_____ of doing meaningless work, Susan dreams of setting up her own company one day.[ ]
A. To be tired
B. Tired
C. Tiring
D. Being tired
呼吸护具分哪几类？
