第6题: [单项选择]The applications of genetic engineering are abundant and choosing one appropriate for this case canbe rather difficult. A. plentiful B. sufficient C. adequate D. countable 参考答案:A
第13题: [单项选择]Who gave a talk at the meeting A. She is a doctor. B. She is a teacher. C. She is a student. 参考答案:C 答案解析:[听力原文] F: Our daughter hasn’ t written to us for nearly two months. M: She must be very busy w
第23题: [单项选择]某女，人流后4个月未来月经，子宫大小正常。用雌孕激素无撤药性出血，最可能的诊断是( ) A. 卵巢性闭经 B. 垂体性闭经 C. 子宫性闭经 D. 下丘脑性闭经 E. 宫腔粘连 参考答案:C 答案解析:[解析] 用雌激素可刺激子宫内膜增生，孕激素使子宫内膜疏松、水肿。雌孕激素撤退后其水平下降，子宫内膜发生缺血性坏死、剥落。此病人用雌孕激素形成人工周期，如果子宫内膜无异常停药后3～7天出现撤药性出血，
