关于网络暴力的英语作文四级？
With the popularization of the Internet,it has become a common phenomenon that people express their ideas freely on the Internet. However,there are different voices on whether free speech should be advocated on the Internet.
Some people agree that everyone should be allowed to share his or her ideas freely on the Internet.They say that since we live in a democratic country,we all have the right to free speech.
However,other people argue that restrictions should be imposed on the expressions on the Internet,for there have been many remarks that spread false information and messages of violence,which has a bad influence on teenagers.
In my opinion,people should be endowed with the right to speak freely on the Internet as long as we improve our moral consciousness.Internet is a good medium for us to share our opinions,but we should not transmit illegal or harmful information.Everyone has the duty to keep our network clean,then we will be able to enjoy the convenience the Internet has brought us.
预防传染病200字作文？
预防传染病作文：
冬季常见的呼吸道传染病包括感冒，流行性感冒，麻疹，水痘，风疹和腮腺炎，这些疾病主要通过空气飞沫传播。
预防和治疗呼吸道传染病应注意以下事项：
1.避免受凉。当人体受凉时，呼吸道的血管收缩，血液供应减少，局部抵抗力降低，并且病毒易于入侵。
2.净化环境，保持室内空气新鲜。应打开规则的窗户进行通风，以保持空气流通，并使阳光直射房间。醋也可以用来熏蒸房间。
3.注意生活规律，确保充足的睡眠。充足的睡眠可以消除疲劳，调节人体的各种功能并增强免疫力。
4.增加营养。补充营养并适当增加水和维生素的摄入量。
5.加强运动，增强体质。体育锻炼可以促进血液循环并提高免疫力。
6.注意卫生。加强个人卫生和个人防护。
7.预防免疫：可以在流行季节之前接种流感，肺炎，麻疹和脑膜炎等疫苗。
8.早期发现和早期治疗。出现呼吸道症状时，应及时就医，避免认真对待，不要自己服药。
