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36、(共24分)(1)流向：总体由东南流向西北（或先东南向西北，再西南向东北）(2分)。变化特点：时间变化：季节变化大（夏季大，冬季小）(2分)：空间变化：从上游到下游流量先增大，后减少(2分)。(2)原因：人为原因：人口增多，城市规模扩大，工农业生产及生活用水增多，使水资源量不断减少、植被不断破环：(2分】自然原因：全球变暖（气候异常)等自然原因导致气候越来越干旱。(2分)影响：敦煌水资源短缺、气候恶化，使月牙泉面临萎缩、干涸威胁：(2分)风沙侵蚀危及莫高窟文物。(2分)(3)总体上：①两县市都要节约用水，提高水资源利用率，进行污水处理：②协调好上、下游地区的用水。具体上：③肃北县位于河流上游，着重保护植被，涵养水源，防止水土流失，保护水质：④敦煌市位于河流下游，着重调整产业结构，控制农业生产规模，发展节水农业，工业用水循环再利用。

第二节（满分25分）》阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。Teen Becomes a Local HeroWhen Sydney Raley headed into her weekend shift on Saturday,December 18,she likely expected to do moreof the same:Stand at the drive-through window,take orders over the headset,and hand each customer their mealwith a smile.In fact,that's exactly how it started.Sydney Raley has been working at a fast food restaurant for about sevenmonths and so far,it's been her typical after-school job.The day had been mostly normal-making coffee,making drinks,and going into the lunch rush.But a few hours into her shift,things took a dramatic turn.After handing a customer some of their food,Sydney let them know that more would be coming as soon as it was ready.But just seconds later,she noticed aterrible look of panic spread across the woman's face.Then came the coughing.She was coughing like crazy andwas speechless.Her daughter was in the passenger seat and looked extremely confused and frightened.Sydney immediately knew she was choking.The first aid training Sydney received more than four years agohit her.Most 15-year-olds might panic at the sight of this.But not Sydney.Instead,the teen remained calm andquickly shouted to both her manager and the woman's daughter to dial 911.Then,she dove through the drive-through window and came to the rescue.The teen pushed the driver's side door forcefully open and got the choking woman to her feet.Then she dugdown deep into her memory bank to recall everything she learned from her Red Cross babysitter class-whichshe'd taken four years earlier.All that training of how to use the Heimlich maneuver(海姆立克急救法)immediately kicked in.Still,she had never actually had to use the life-saving technique before,and after a fewtries,it wasn't quite working.Luckily,another customer was just a few feet away in the parking lot.注意：1.续写词数应为150左右；2.请按如下格式在相应位置作答。She shouted to that man for assistance.The man heard Sydney's cry and rushed over.Sydney briefed him onthe situation,and the man did not hesitate to help the woman.He used the same Heimlich maneuver,but harderthan Sydney.And happily,it worked this time,after which the woman threw up the food stuck in her throat andbegan gasping for air,and she was saved.The woman and her daughter thanked Sydney and the man.Sydney wasthrilled to have saved the lady.The story has made headlines throughout the country.All the media praised Sydney and the man for theirbravery,and how calmly she performed the Heimlich maneuver in an emergency.From this story,people realizedthat everyone should master the Heimlich maneuver in case someone around them chokes,so the media called forschools to train students to master skills of the Heimlich maneuver.Some schools have invited doctors and nursesfrom the emergency department of the hospital to explain the operation of the Heimlich maneuver to students,which has been well received by parents and the community.