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材料一:网络既给我们带来了有利影响,也给我们带来不利影响。据调查,在违法犯罪的未成年人中,有近50%的未成年人存在网络依赖,有6096的未成年人遭受过来自网络、手机登不良信息的影响。

材料二:2016年8月16日,以“协同联动,共建安全命运共同体”为主题的第四届中国互联网安全大会在北京召开。截至2015年12月底,中国网站总量达到426.7万余个,但公共互联网环境仍然面临较为严峻的安全态势,互联网站作为互联网的主要人口,面临着黑客以瘫痪目标业务系统、窃取用户有价值信息等为主要目的攻击威胁。网页仿冒已经形成成熟地下产业链,并呈现增长趋势.

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   A ban on smoking in most public places goes into effect(效果) on Sunday in China - home to a third of the world's smokers. That means around 300 million smokers will no longer be allowed to light their cigarettes in the "enclosed public places." These include hotels, restaurants, theaters and public transport waiting rooms. The ban does not cover offices or factories.
   The campaign is aimed at controlling(控制) the number of deaths from smoking-related illnesses, running at a million a year. According to the World Health Organization, more than 3,000 people die every day in China because of smoking. Health experts also hope it will help Chinese to raise the knowledge of the dangers of smoking.
   But the new rules have been criticized because they do not include punishments(处罚) for those who choose not to obey them.Most people worry that Chinese smoking ban may have little effect.
   Business owners often hate rules that force(强迫) them to ban smoking on their restaurants, bar, cafe..., because many customers(顾客) do not like the rules and complain. Often you find people smoking at the next table while you are eating your meal or having a drink in a bar.
It appears that many Chinese people don't know the dangers of smoking. Research suggests only one in four knows the harm(害处) cigarettes or second-hand smoke can cause.
   At the same time the government makes a lot of money from the sales of cigarettes by the state-owned firms that make and sell all tobacco products throughout the country.