如今,洪水滥、空气污浊、噪音严重危害人类健康等问题如同恶魔紧紧缠绕着人类,更多的人在它们手中丧命。俗话说:“魔高一尺,道高一丈。”解决这些问题的办法归根结底只有两个字:绿化。可别小看它哦,它的好处多着呢。绿化,乃植树种草也。种植这些含有叶绿素的植物,对改善空气质量有很大的帮助。首先,绿色植物可以在阳光下进行光合作用,吸收二氧化碳,释放氧气。研究表明,植物每生长1吨,可以产生5吨氧。每公顷树林每天可以吸收1吨二氧化碳,产生0。735吨氧气;每公顷草地每天能吸收0。9吨二氧化碳,产生0。6吨氧气。充足而洁净的氧气能让人类身心保持健康。其次,地球上的树林每天可向大气中散发1。7亿吨萜烯物质,这种芳香物质具有无可比拟的***菌能力和兴奋作用。然后,绿色植物对空气中的灰尘、粉尘有良好的过滤和吸收作用,并能阻挡工作粉尘向空气弥散。据测定,大气通过林带,可使粉尘量减少32%-52%,飘尘量减少30%。你知道吗?森林中的负氧离子可达到10-100万个。负氧离子能调节神经系统的.兴奋和抑制状态,改善大脑皮层的功能。
医学专家模拟森林的神奇作用,把负氧离子引进病房。结果发现,当环境中负氧离子与正氧离子的比例控制在9:1时,对气喘、烧伤、溃疡、外伤病人的治疗可起促进作用。除此之外,绿化还有吸收噪音、减少水土流失等功能。把你的一份力量投入到我国的绿化事业中去吧,那一抹绿意会向你慢慢诉说它的好处专家指出,花香能治病能保健,同样也能致病能伤身,空气中花味过于浓郁,氧含量相对减少反而会刺激人们过度换气,使血液中氧含量降低,会出现头痛、头晕、恶心等症状,部分过敏体质的人,受到有些花粉的刺激,会出现过敏性哮喘,过敏性鼻炎。例如,兰花能帮助缓解热咳,也可能会起催生作用,兰花香闻得过多,使人过于兴奋而产生眩晕感;百合花香使人兴奋,但时间过长,会感到头晕,还可能让人失眠。
新教徒认为虚度光阴是万恶之首,在原则上是最不可饶恕的罪恶。人生短促,这短暂的人生无限宝贵,社交活动、无聊闲谈、沉迷于享乐,甚至是超过健康要求时间的睡眠,这些行为都是应遭受道德谴责的。
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Different people have different views on_____.Some people think that_____,whereas others aegue that __________.
As far as I am concerned, I agree with the opinion that ___________.For one thing,I firmly believe that ___________.For another,_____________.Just think of________,who/which_______.
Taking all these factors into consideration,we may safely come to the conclusion that______.Only if_______can we _______,just as the saying goes,________________.
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In recent years there have been many reports of ________.It turns a new chapter of _________in China,and will have far-reaching effects in the forthcoming years.
The biggest benefit,in my eyes,is that_______.In addition,_______.Finally,______________.
Apart from the benefits mentioned above,we should also face several unavoidable challenges.In the first place,_____________.In the second place,________.What’s more,_______________.In summary,we should_______________.
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Nowadays more and more ______are commonly and widely used in everyday life,ranging from __________to_____________.
The popularity of _______will have a great influence on ______.On the one hand,_________.On the other hand,__________.
To conclude,____________are just like a double-edged sword.With them we may________.However,one point should be kept in mind that we should make sensible use,always being a master instead of slaving of them.
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