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找不到好的英语六级听力练习材料?绝对是你的不二选择。大家平时多用英语磨耳朵，时间长了英语六级听力绝对会有很大的提高。 英语六级听力练习：标准4.5 点击收听 WASHINGTONThe White House says a social media communications network created by the U.S. government in Cuba was a development program, not a covert operation. The Associated Press reported earlier that the network sponsored by USAID was designed to undermine Cubas communist government by building a text-messaging service that could be used to organize political demonstrations. On the bustling streets of Havana, people continued to talk about the social media network ZunZuneo - Cuban slang for hummingbird. The Twitter-like text messaging service operated for two years and had tens of thousands of cell phone users. It was a very noble service. You would log on, and you could write 140 characters and hit send. It was free of charge, said former client Ernesto Guerra. But his friend, Saimi Reyes, another user, said she often had doubts about the service. Sometimes I would wonder where this is from, where does the money come from? Because, all this for nothing wasnt possible, she said. According to the Associated Press, the idea was to build up a large social network through targeted text messages, allowing Cubans to communicate with one another, and later to push messages which USAID hoped would encourage dissent. | 
