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提醒：msnbc.com: Tech and gadgets
【标题】Mobile apps test your Presidents' Day IQ
【摘要】for parents looking for homework help, or to inspire kids with presidential examples beyond george washington and abraham lincoln this presidents' day, you can take your young learner on a fun and educational meet-and-greet with the 44 u.s. presidents using these apps. ... (02-20 23:50)
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