The components that make up haze may have negative effect on people's health especially that of the children and the elderly. Also not excluded are those who have certain diseases such as asthma, allergy, and pneumonia and lung disease. Workers working in the open air have a high risk in their health.
组件构成烟雾可能对人们的健康有负面影响特别是儿童和老人。也不排除是某些疾病如哮喘、过敏、肺炎和肺部疾病。工人工作在露天有很高的.风险在他们的健康。
其实,废旧电池的危害简直好比一个,随时都有可能爆炸,只要在爆炸范围之内,就一定会受到它强大的攻击,浅则影响身体健康,重则危机到身命。有关资料显示,一节一号电池烂在地里,能使1平方米的土地则永久失去了利用价值;一粒纽扣电池则可以使600吨水受到污染,这一个多么令人惊叹的'数字啊!这么多水是相当于一个人一生的饮水量,还有,电池里含有汞、铅、镉等多种重金属物,其中的汞一种具有毒性强烈的重金属,对人体中枢神经的破坏力很大等;而铅则能使人铅中毒等;镉会造成骨质疏松等。如果将废旧电池与生活垃圾一起被埋到土里,或随手丢弃,渗出的汞和重金属物就会渗透于土壤、污染地下水,破坏人类的生存环境,威胁到人类的身体健康。
同学们,怎么样,同过我的介绍,你们应该清楚废旧电池的危害了吧,说明文。以后就要把废旧电池扔进电池回收箱里拉。简评:哇!不听不知道,一听吓一跳。小小电池,竟然也可以造成如此大的危害。
比如网络它会让我们的身心都沉浸上去;跳山羊它会让我们的身体受到伤害;斗鸡它会让我们摔跤,轻的会破皮,重的.可能会骨折。
网游它会让我们的心沉浸在网络的危害中,所以我们要主动去做一些事情——戒掉’网瘾‘。首先要主动避开,与其被电脑诱惑,不如主动把家里的电脑搬走;放学路过网吧,赶紧绕行;听到同学谈论网游就转身离开。另外转移注意力也很重要。
跳山羊的危害也很大,它会让我们的身体受到伤害,如:后脑勺。脖子等部位,要是你这里摔了,那里摔了,通的人可不是别人,而是你自己,我们班就发生过这种事情。九月二十六日,下午第三节课,讲台前面站了好多人,是怎么回事?原来都是跳山羊惹的祸,站在前面的同学一下课就去玩跳山羊,被老师发现了,全被狠狠地批评并保证以后在不玩跳山羊了。
斗鸡它会让我们摔跤,轻的会破皮,重的可能会骨折。父母可怖希望你们摔摔哪了,摔摔这里吧!父母可是希望你们健健康康的。
每一种游戏都有它的危害,每一种游戏都要控制的去玩,可不能沉浸在游戏里面啊!
今天上音乐课的时候,我借张一诺《赛尔号》的书在课上看了一眼,结果被老师发现了。所以,我准备研究游戏对学生的危害。
{问题的猜想}
我觉得沉迷于游戏,会导致上课不听讲、不认真完成老师的'任务、学习的态度一塌糊涂。
{问题的解决}
首先我来谈谈危害。长时间玩电脑游戏对人的身产生危害,如视力下降,食欲减退,头昏脑晕;第二,长时间玩电脑游戏会影响人的注意力,占用学习时间;第三,沉迷于电脑游戏使人得不到正常的休息,打破了生活规律,有的学生迟到晚起,睡眠不足,上课时昏昏沉沉,无精打采。第四,有的游戏内容不健康,宣扬暴力和迷信等等,影响了青少年的思想健康。
{自己的想法}
看来游戏对我们小学生的危害这么大,大家可千万别玩游戏!
{我想说的话}
一定要控制自己,少玩电子游戏,但可以玩对自己有好处的游戏。也可以,运动、看书、画画开阔自己的心胸,让自己合理的安排时间。
希望大家能做一个文明的好学生!
Recently, the topic of air pollution has again aroused more and more attention since pollution haze, a kind of weather, has appeared increasing frequently in our cities. Just as the picture showed, when pollution haze comes, the whole city was covered with suspended particles which can breath into our body causing heavy problem to our health.
Due to the bad effect from pollution haze, a green and clear environment, rather than anything else, turns to be an important role and a urgent issue in our daily lives. Meanwhile we just live in only an earth, if we didn’t try to protect our common hometown, we would have no place to settle.
Thus, we should take effective measures to rebuild our beautiful environment of the cities from now on.
In my opinion, law and regulations should be enforced by the government and authorities to control the emission of polluting gas. To ourselves, we should enhance the awareness of environment protection and choose a green lifestyle to make contribution to our earth day from day
1,实验:将一枚生锈的铁钉放入一罐可乐中,放在墙角十几天后,铁钉居然会逐渐溶解!
思考:有关资料表明,可乐中的磷酸属于强酸,即使经过稀释,还有一定酸度。这么厉害的磷酸进入我们的胃,我们的胃部能舒服吗?
2,实验:把可乐含在口中,过五秒钟后吐掉,发现牙齿酸酸的,这是磷酸在作怪。
思考:可乐中含有磷酸和二氧化碳溶解后形成的碳酸,对牙齿有一定的腐蚀作用,喜欢喝可乐的人牙齿一定败得快。同样的,可乐中含有的磷酸会影响人体对钙的吸收,导致骨质疏松。
3,实验:可乐是甜的,可乐中含有大量糖,这些糖吸收速度很快,容易造成热量摄入过量。
思考:热量摄入过量,会导致肥胖,小孩子过度肥胖影响身体的正常发育,而且营养低、热量高的碳酸饮料让孩子们少喝了牛奶和其他有营养的饮品,减少了发育成长必需的维生素和矿物质的摄入量。
4,资料:可乐中含有大量的`咖啡因和二氧化碳。在美国达利大学有场比赛:看谁能喝最多的可口可乐?获胜者喝了八瓶,并当场死亡,因为血管中含了太多的二氧化碳,而使得人的身体没有足够的氧。
思考:可乐中含有咖啡因,1瓶340克的可乐型饮料含有咖啡因毫克,有人做过试验,成年人一次口服咖啡因1克以上,可以引起中枢神经系统兴奋,呼吸加快、心动过速、失眠、眼花、耳鸣。喝过多的可乐,摄入过多的二氧化碳和咖啡因,晕倒就已经是正常的事情了。
Recently, the topic of air pollution has again aroused more and more attention since pollution haze, a kind of weather, has appeared increasing frequently in our cities. Just as the picture showed, when pollution haze comes, the whole city was covered with suspended particles which can breath into our body causing heavy problem to our health.
Due to the bad effect from pollution haze, a green and clear environment, rather than anything else, turns to be an important role and a urgent issue in our daily lives. Meanwhile we just live in only an earth, if we didn’t try to protect our common hometown, we would have no place to settle.
Thus, we should take effective measures to rebuild our beautiful environment of the cities from now on.
In my opinion, law and regulations should be enforced by the government and authorities to control the emission of polluting gas. To ourselves, we should enhance the awareness of environment protection and choose a green lifestyle to make contribution to our earth day from day.
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