早期孤立阿弗它溃疡,用何种药物灼治可促进愈合并止痛()。
A.3%碘酊
B.70%酒精
C.20%三氯醋酸
D.10%硝酸银
E.3%过氧化氢
参考答案:D
---You seem used to sleeping in the street.
---Oh, no. ______, I hate it, but I have nowhere to go for shelter.
A.On the other hand
B.On the contrary
C.It depends
D.Generally speaking
古诗中有许多描述光学现象的诗句,如“谭清疑水浅”,说的就是光的 现象