【判断题】【消耗次数：1】
全球定位系统是美国从20世纪70年代开始研制的。
①
正确
②
错误
参考答案：
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相关题目
【多选题】
20世纪70年代开始，人工智能进入首次低谷期的原因包括（）。
①
A.计算机内存有限
②
B.计算机处理速度不够快
③
C.计算复杂性和指数爆炸
④
D.许多问题只可能在指数时间内获解
【简答题】
简述20世纪70年代以来课程内涵变化的趋势。
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