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每天一篇“今日美史”，提炼和总结历史在今天发生的重要事件：谁，在哪里，什么时候，做了什么，这件事为什么重要，以及在写关于什么主题的论文的时候可以作为潜在的论据引用。 每天30秒，轻松积累史实 为AP美国历史拿5分打下坚实基础 Where: San Francisco, CaliforniaWho: Facebook, Kevin Systrom and Mike KriegerInstagram is another app that was introduced to exchange and share photos and short videos on social media with a variety of filters. It competes with Snapchat and interfaces with the other social media giant, Facebook.
As another popular media exchange, users find both expression and derision in sharing images that run from the beautiful and poignant to the mundane and even trivial. Capable of sharing with a global community almost instantly builds bridges for community as well as for bullying. App moderators are constantly at odds with how to allow freedom of expression and personal security on the same platform leading to accusations of censorship as well as insufficient security.Social media, smart phones, personal networking services.
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