题型:选择题 —I was ill yesterday. —_____. I hope you are better now. [ ] A. Best wishes B. Bad luck C. Nice to meet you D. I’m sorry to hear that 查看答案
题型:单项选择题 周围血管检查时,以下哪种情况可以同时获得最佳的二维图像和最佳的血流显像()。A.二维和CDFI的声束/血管夹角都尽可能垂直B.二维和CDFI的声束/血管夹角只要一致就行C.二维的声束/血管夹角尽可能小,而CDFI的声束/血管夹角尽可能垂直D.二维和CDFI的声束/血管夹角都尽可能小E.二维的声束/血管夹角尽可能垂直,而CDFI的声束/血管夹角尽可能小 查看答案