CT增强中最常用的对比剂有 A.氧气 B.硫酸钡 C.碘油 D.离子型有机碘剂 E. 发布时间:2018-06-24 05:37 │ 来源:www.tikuol.com 题型:多项选择题 问题: CT增强中最常用的对比剂有A.氧气B.硫酸钡C.碘油D.离子型有机碘剂E.非离子型有机碘剂
题型:多项选择题 —Mom, where is David?—He is working _____ that difficult math problem in his room.[ ]A. for B. with C. on D. in 查看答案