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初中手机利弊英语作文

when people use mobile phones, mobile phones will be transmitted to the base station to transmit radio waves, and radio waves will be more or leabsorbed by the body, these waves are mobile phone radiation.

In general, the phone standby radiation is small, when the call is a little larger, and the phone number has been dialed and not yet connected, the largest radiation, radiation is about 3 times the standby time. These radiation may change the human tissue, adverse effects on human health. Don't put the pillow according to Professor Zhao Yufeng Chinese upholstery Association Indoor Environmental Monitoring Committee, the mobile phone radiation on the human head is more harmful, it will be one of the central nervous system disorder caused by function, causing headaches, dizziness, insomnia, dreaminess, hair loand other symptoms, some facial irritation. In the United States and Japan, there are many suspected mobile phone radiation causes brain cancer cases. Last July, the United States of Maryland a man suffering from brain cancer that the use of mobile phone so that he was suffering from cancer, so the mobile phone maker filed a lawsuit. Therefore, it is best to answer the phone when the phone is far from the body to get through the distance, and then put into the ear call. In addition, as far as possible not to use the phone to chat, but also pay attention to sleep when the phone is not on the side of the pillow. Mo hung in front of a lot of girls like to hang the phone in front of the chest, but studies have shown that the phone hanging in front of the chest, will have a certain impact on the heart and endocrine system. Even in a small standby state, the electromagnetic radiation around the phone will cause harm to the human body. Heart failure, arrhythmias with particular attention to not put the mobile phone hanging in the chest. Some experts believe that electromagnetic radiation will also affect endocrine function, leading to female menstrual disorders. In addition, electromagnetic radiation will affect the normal cell metabolism, resulting in potassium, calcium, sodium and other metal ions in the body. Shielding devices are usually equipped with mobile phone, can reduce the harm of radiation on the human body, aluminum, lead and heavy metal shielding equipment protection effect is good. But women in order to look beautiful, often choose small cell phone, the phone's protective function may not be perfect, therefore, it is best not to hang up the phone in front of a female friend.

好处就是方便了我们的联络.

坏处有:当人们使用手机时,手机会向发射基站传送无线电波,而无线电波或多或少地会被人体吸收,这些电波就是手机辐射。

一般来说,手机待机时辐射较小,通话时辐射大一些,而在手机号码已经拨出而尚未接通时,辐射最大,辐射量是待机时的3倍左右。这些辐射有可能改变人体组织,对人体健康造成不利影响。 别放枕头边 据中国室内装饰协会室内环境监测工作委员会的赵玉峰教授介绍,手机辐射对人的头部危害较大,它会对人的中枢神经系统造成机能性障碍,引起头痛、头昏、失眠、多梦和脱发等症状,有的人面部还会有刺激感。在美国和日本,已有不少怀疑因手机辐射而导致脑瘤的案例。去年7月,美国马里兰州一名患脑癌的男子认为使用手机使他患上了癌症,于是对手机制造商提起了诉讼。因此,人们在接电话时最好先把手机拿到离身体较远的距离接通,然后再放到耳边通话。此外,尽量不要用手机聊天,睡觉时也注意不要把手机放在枕头边。 莫挂在胸前 许多女孩子喜欢把手机挂在胸前,但是研究表明,手机挂在胸前,会对心脏和内分泌系统产生一定影响。即使在辐射较小的待机状态下,手机周围的电磁波辐射也会对人体造成伤害。心脏功能不全、心律不齐的人尤其要注意不能把手机挂在胸前。有专家认为,电磁辐射还会影响内分泌功能,导致女性月经失调。另外,电磁波辐射还会影响正常的细胞代谢,造成体内钾、钙、钠等金属离子紊乱。 手机中一般装有屏蔽设备,可减少辐射对人体的伤害,含铝、铅等重金属的屏蔽设备防护效果较好。但女性为了美观,往往会选择小巧的手机,这种手机的防护功能有可能不够完善,因此,女性朋友最好不要把手机挂在胸前。

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