术前放疗的优点有().
A.照射范围较小
B.肿瘤血供未影响
C.不影响伤口愈合
D.可减少因手术操作引起的播散
E.不延误手术时机
参考答案:A, B, D
— Some Chinese students find it hard to get used to the life in London.
— Exactly, ______ they've learnt a lot about the city before. [ ]
A. if
B. now that
C. as though
D. even though
女,30岁,拟下一周期放置宫内节育器,平时月经周期为28天,于月经第14天时性交,阴茎套破裂,要求事后避孕。
最适宜的选择的避孕方法为
A.宫内节育器 B.雌孕激素C.大剂量雌激素 D.皮下埋植E.口服短效避孕药