物体放在凸透镜前,到凸透镜的距离是16厘米,此时光屏上得到的是放大的像。则所用的焦距很可能是[ ]
A.4cm
B.8cm
C.10cm
D.18cm
答案:C
-- Excuse me. ________?
--That's $ 5 altogether, sir.
A.Can 1 order, please
B.Could I have the bill, please
C.How much is the meal we've had
D.Please count the money, will vim
子宫脱垂Ⅱ度重是指
A.子宫颈外口在坐骨棘水平以下
B.子宫颈外口下降至处女膜缘内不足4cm
C.子宫颈外口脱出 * * 口外
D.子宫颈及部分子宫体脱出 * * 口外
E.子宫颈及子宫体全部脱出 * * 口外