请结合现实论述新闻媒介的正效应和负效应。（南开大学）
相关试题：联系新闻传播的实际，谈谈你对新闻媒介正负效应的看法。（中南财大）

关于先秦诸子散文的发展阶段论述。

阅读下面材料，按要求作文。
   一位城里人带着孩子在乡下一户人家度过了一天一夜，城里人让孩子描述下城里和乡下的区别，儿子想了想说：“我们家里只有一条狗，可是有他们家里有4条狗，他们家里仅有一个水池，可他们家有条望不到边的小河，夜里我们的花园里只能看见几盏灯，可他们的花园上却有千万颗星星，还有我们院子里只能停辆小汽车，可他们院子里能容下几百头奶牛。”城里人愕然，接着儿子又说：等我长大了，要过上和他们一样的生活。
 根据材料所引发思考和感悟，写一篇论说文，要求用规范的现代汉语写作，角度自定，立意自定，标题自拟，不少于800字。

如何认识非公有制经济在社会主义市场经济中的重要作用？[东北财大；中央财大]

规模报酬递减

这堂课中学生必须会的技能有哪些?

请演示Babinski征的检查方法 。

案例：
蒋老师上课一开始就引导学生把课本翻到《外国现代绘画》部分，那是一个新的内容，要求学生先看几分钟书，再把自己不理解的问题提出来讨论。五分钟后，一位同学勇敢地站了起来提出了一个具有普遍性的问题：“我实在看不懂梵•高的作品。”于是蒋老师拿出预先准备的一段录像《梵•高的追求》，录像放完后，给学生提出了一个问题：“梵•高讲艺术家总是用作品来说话，那么梵•高用作品对我们讲了些什么？”一名学生感慨地说：“我从画中看到了梵•高是热爱生活的，他是用生命在作画。”接着，有同学提出不理解超现实主义的作品。蒋老师简单地讲述了弗洛伊德的潜意识理论，并向学生推荐了一本书《梦的解析》。这课堂变成了师生共同讨论解决问题的场所，电教设备、教科书，甚至老师都成了学生的一种资源。
问题：指出该老师教学中的优点。在新的教育情境中，美术教师需要改变什么？

根据提供的信息和语言素材设计教学方案，用英文作答。
设计任务：请阅读下面学生信息和语言素材，设计20分钟的英语听说教学方案。该方案没有固定格式，但须包含下列要点：
●teaching objectives
●teaching contents
●key and difficult points
●ruajor steps and time allocation
●activities and justifications
教学时间：20分钟
学生概况：某城镇普通高中三年级学生，班级人数40人，多数学生已经达到《普通高中英语课程标准（实验）》六级水平。学生课堂参与积极性一般。
语言素材：
A great Chinese scientist
Father of the Chinese space programme
Yu Ping(YP) is talking to her friend Steve Smith(SS) about Qian Xuesen and his work as a rocket scientist.
Part 1
YP:What do you want to be when you grow up, Steve?
SS:I want to be an astronomer and visit stars.1 wish to visit Mars one day.
YP:I think I'd like to work in the space industry too. I'd like to be a rocket scientist like Qian Xuesen.
SS:What did he have to do to become a rocket scientist?
YP:Well, he first studied at university to be an engineer. Later he went to America to study for his doctor's degree. It was then he began to work on rockets.
SS: So it was lucky for our space programme that he came back to China.
YP:Very much so. There was no work on space rockets in China before his institute to design and build rockets to go into space.
Part 2
SS: Do you think he wanted to travel into space in one ofhis rockets?
YP:I have no idea but I believe he looked forward to the first space flight by a Chinese astro-naut.
SS: Yes. Now that China has sent satellites into space, I hope we'll be the first to land on Mars.That would really be something special and ifl were that astronaut I would put Qian Xuesen's picture on Mars to show how much we admire his work.
YP: Indeed. He is rightfully called the father of the Chinese space programme. He is my hero and this is why I want to be a rocket scientist.
SS: Well, we'd better get on with our homework. We need good grades to get into university.
YP: Right you are. See you, then.
SS: See you.

结合本案例，分析托运人是谁以及存在的主要问题。

针对事件一中提到的钢筋，护坡单元工程以及混凝土试件，抽样检验不合格的情况，分别说明具体处理措施。