未知题型 未婚女性，19岁，原发性闭经，乳房发育正常，外阴未见异常，B超探及子宫大小约4cm*3cm*1cm,两侧附件未探及异常，行孕激素实验，雌激素孕激素序贯疗法，均未引起子宫出血。该患者功能异常的部位是：

未知题型 依据《环境影响评价技术导则 地表水环境》，河流水质预测一维稳态模式的适用条件是( )。

单项选择题 听力原文：W: I didn't see you at the company picnic last weekend. You had such a good time at the last one, so I was surprised when you didn't show up for this one.M: I had planned to go, but when I got up in the morning, it looked like it was going to rain, so I decided to stay home instead.W: It looked like rain? Are you sure about that? It was sunny all day long at the picnic site.M: When I woke up in the morning, it was really cloudy and overcast, so I just went back to bed. I suppose that the weather cleared up later on in the day.Why didn't the man attend the picnic?A．He didn't enjoy the previous one.B．He thought it was going to rain.C．He had some other weekend plans.D．He wanted to stay home instead of going out.