Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now listen to the passage. It is unnecessary to reply to an invitation when _________.
A. the invitation bears the letters "R. S. V. P"
B. you are very busy.
C. a great many people are invited.
D. the hostess wants to invite others.
排卵大多在下次月经来潮前
A. 5天左右
B. 7天左右
C. 14天左右
D. 21天左右
E. 24天左右
当月经出现下列哪些情况时,需检查治疗
A. 本次月经前出现皮肤痤疮
B. 月经期下腹及腰骶部酸痛,不影响学习和工作
C. 12岁女孩,月经初潮后2年,2~3个月来1次月经,经期5~7天
D. 14岁女孩,月经初潮13岁,此次月经量多,伴贫血
E. 49岁妇女,近半年来月经不规律5天,2~3个月,量不多,伴轻度潮热症状
子宫内膜腺上皮细胞底部出现含糖原小泡,表明子宫内膜处于哪一期
A. 月经期
B. 分泌早期
C. 分泌晚期
D. 月经前期
E. 排卵期