论生态安全

救救地球与人类!21世纪必须加紧保护地球生态系统。要着重向全社会宣传“地球对人类活动的承载力有极限,”“人与环境之间进行物质、能量、信息的交换必须和谐”的道理,促进人们为实现生态安全而进行更有效的工作。     

《只有一个地球》教学设想

《只有一个地球》的一个重要特点就是“保护地球，势在必行”的思想感情渗透在五项叙事说明之中（人类拥有的地球美丽而渺小；地球上人类活动范围小；地球上资源有限；人类不能够居住在别的星球上；呼吁人类精心保护这唯一可赖以生存的星球），全文由题目贯穿，它虽是科普说明文，但耐读性强。“新课标”在“课程的基本理念”中明确指出：“学生是学习和发展的主体。”语文课必须“充分激发学生的主动意识和进取精神，倡导自主、合作、探究的学习方式。教学内容的确定，教学方法的选择，评价方式的设计，都应有助于这种学习方式的形成。”一…     

生态教育应是地理教学的重要任务

生态教育的首要任务是使学生具备生态意识，建立正确的生态观。生态意识是人类必须具备的意识形态，来源于人类对地球生态系统的认识，来源于对生态危机的理解以及现在对生态平衡的破坏所造成的后果的反思和关注。生态意识决定着人类对生态环境的行为方式和对待生态问题的态度。例如：当人类认为地球是个聚宝盆，有着“取之不尽，用之不竭”的资源时，便无所顾忌，乱采滥用自然资源，结果造成资源的大量浪费；当认识到地球资源的有限性时，便出现“宇宙飞船经济”理论，认为地球只是宇宙空间的一艘“飞船”，人口与经济增长都会耗尽地球资源…     

话说地球新发现

人类对自己的摇篮——地球的认识,自古以来,既有许多美好的传说,也有不少迷茫的误解。随着时代的进步,人类对地球逐渐有了比较全面深刻的了解。现代科学技术的高速发展,科学家对地球的研究日益精深,又有许多新发现,所以人类必须不断地重新认识地球。 一、地球的质量在增加 自从牛顿发现万有引力定律以来,人类将它应用于天文学上,算出地球的质量是5.98×10~(24)千克,其实这个数据除了“粗略”之外,还具有“瞬时”性。据有关科学家研究测算,每年约有千万吨“宇宙灰尘”落在地球上(当然包括各种陨石之类),这些“灰尘”除了部分可     

生态教育应是地理教学的重要任务

生态教育的首要任务是使学生具备生态意识，建立正确的生态观。生态意识是人类必须具备的意识形态，来源于人类对地球生态系统的认识，来源于对生态危机的理解以及现在对生态平衡的破坏所造成的后果的反思和关注。生态意识决定着人类对生态环境的行为方式和对待生态问题的态度。例如：当人类认为地球是个聚宝盆，有着“取之不尽，用之不竭”的资源时，便无所顾忌，乱采滥用自然资源，结果造成资源的大量浪费；当认识到地球资源的有限性时，便出现“宇雷飞船经济”理论，认为地球只是宇宙空间的一艘“飞船”，人口与经济增长都会耗尽地球资源并造成污染，导致最后的崩溃。     

用矛盾的观点认识科技发展与自然界的关系

自然界,特别是我们人类居住的地球,是我们人类诞生的摇篮,也是我们人类社会生存和发展的基础。由于人类社会发展的需要,由于科学技术的发展,特别是近百年来科学技术的突飞猛进,人类对自然的索取达到了惊人的地步。这种索取的结果带来了“生态失衡”、“环境恶化”、“人口爆炸”、“能源危机”、“资源馈乏”、“全球变暖”等全球性问题。这些全球性的问题已直接威胁到人类的生存和可持续性发展。如何正确认识和解决人类社会科技发展与自然界的矛盾是全体地球儿女们必须严肃认真对待的大事,唯物辩证法告诉我们:任何事物都充满着矛盾,正是这种矛盾推动着事物的变化和发展。用矛盾论的观点来分析和处理人类社会目前面临着的“全球性问题”或者说人类社会科学技术发展与自然关系问题是非常必要和有益的。     

浅议地球的权利

从历史发展的角度分析地球与人类之间的关系，指出地球是人类发展的母体，人类是地球的一分子．地球对人类活动有反作用力，人类必须赋予地球受保护、被尊重、环境被改善和可持续发展等权利，且这些权利必须受全人类法律和道德维系。     

星际移民谈何容易

美国航空航天局发现了“另—个地球”,它有可能成为人类的“第二家园”吗? 另一个地球 早在2006年,英国科学家霍金就曾警告说,人类如果想一直延续下去,就必须移民去其他的星球,因为地球迟早会灭亡.2015年7月24日,美国航空航天局宣布,发现了首颗太阳系外位于恒星“宜居带”的体积最接近地球大小的行星.这一代号为“开普勒-452b”行星的发现,使已确认的系外行星数量增加到了1030颗.对人类未来多少有点担忧的人们,因此兴奋了起来,人类找到了“第二家园”?     

未来50年大预测———20世纪将是“共存”的世纪

未来５０年大预测———２０世纪将是“共存”的世纪王庆华译酉星校从８０年代开始，地球就出现令人不愉快的刺耳噪音。这是人类以外的生物以其强劲的实力欲征服地球的结果，也是人类我行我素所导致的结局。２１世纪，人类必须具有与异种生物一起生活的意识。“自然＝万物...     

增强幼儿环保意识的教学探索

我们只有一个地球．地球是人类共同的家园。但是。由于污染的蔓延和生态平衡的破坏，人们已在呼唤：“保护环境．救救地球!”幼儿是明天地球的主人．为了人类未来的生存和发展．我们必须重视幼儿环保教育，对此，我们进行了一系列的环境保护教育探索．将环保教育全面渗透于幼儿的一日活动中，积累了一定的实践经验。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.