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植物在环境保护中的作用 总被引：3，自引：0，他引：3
环境保护是我国的一项基本国策，文章概述了植物在环境保护中的作用：（1）在环境污染治理中的作用，包括治理土壤污染物、水体污染物、大气污染物；（2）在环境污染监测中的作用；（3）在环境保护中的其它作用。 相似文献
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辐射技术处理环境污染物的研究 总被引：1，自引：0，他引：1
辐射技术以γ射线或电子束做为基本手段,在环境污染治理中的应用日益广泛.文中阐述了辐射技术的化学基础及其机理,进而介绍了电子束辐照烟气脱硫、辐照处理废水中难降解有机污染物的机理及应用,说明辐射技术在环境保护中具有重要作用. 相似文献
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正环境问题已经被世界各国所重视。许多污染物的成分、特性、形成过程及危害都与化学关系十分密切,化学也在环境污染的防治上发挥着举足轻重的作用,历年中考中常有关于环境保护和污染治理的试题出现。现将2013年中考中有关环境污染和防治的试题归类分析如下。 相似文献
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1．知道中国环境保护标志;
2．了解环境污染的危害和环境保护的必要性.
3．了解空气污染严重的程度及其对人类、动植物产生的不良影响,知道严重危害空气质量的主要污染物及各污染物的主要来源． 相似文献
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以“环境污染治理”为问题情境,通过数据对比,凸显酶降解污染物的高效性,引导学生提出“利用酶治理环境污染”的构想,进而以问题驱动学生自主开展科学探究,阐明酶的污染处理技术的具体实践要求,提升学生的问题解决能力,认识科技对治理环境污染的重要作用,树立生态环境意识。 相似文献
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王鹏程 《河北北方学院学报(社会科学版)》2014,(3):75-77,91
环境污染治理需要多方共同参与,单纯一部环境保护法不足以有效遏制环境污染。在"环境优先发展"和资源可持续利用理念下,提出提高环境污染治理中财税法的立法权威、构建可持续发展的环境税收保护机制、厘清环境污染治理中政府责任的划分机制以及鼓励公众和律师参与机制等多元治理路径。 相似文献
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以化学污染物为主要研究对象的环境保护化学，在自然科学中的地位日益重要。如何寓环境保护教育于实验教学之中，是摆在化学教育工作者面前的一个值得深入探讨的课题。针对实验存在对环境污染的问题，我们在教学中采用了一系列环保措施。 相似文献
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《海外英语》2007,(4):36
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. 相似文献
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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. 相似文献
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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. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rajesh Kanoi 《海外英语》2007,(1):52
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer. 相似文献
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正A One day a pig went to the stable(马棚)to see his good friend,an oldhorse,and was going to stay there forthenight.Night came and it was time forsleep.The pig went into the straw heap(稻草堆)and lay comfortably.A longtime passed,but the horse was stillstanding there and did not move.Thepig asked the horse why he did not go tosleep."Standing like this is the begin-ning ofsleeping,"answered the horse. 相似文献
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《今日中学生》2014,(9)
正1.Any fool can count the seeds in an apple.Only God can count all the apples in one seed.2.Happy families are all alike;every unhappy family is unhappy in its own way.3.Memories are the key not to the past,but to the future.4.Sometimes in the dark you see what you want to see.5.There is a great difference between 相似文献
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《重庆大学学报(英文版)》2014,(2)
正Scope and Policy The Journal of Chongqing University-English Edition(JCQU-E)is a peerreviewed journal publishing research articles in multiple disciplines of science and technology,covering civil and environmental engineering,chemical engineering,biotechnology,mechanical and electrical engineering,computer and data processing,mining,metallurgy,materials science,and interdisciplines thereof. 相似文献