—Mary, you bring my math book to school?
—OK, Dave. [ ]
A. can
B. are
C. do
D. is
答案:A
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