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大数据对人才能力的要求是数学统计能力。()

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促进“一带一路”相关国家的贸易和投资合作，智库交流和对话并不重要。()

The boy with his two dogs ____ when the earthquake happened

A. were sleeping
B. is sleeping
C. was sleeping
D. are sleeping

截至2017年7月，我国已与53个沿线国家建立734对友好城市关系;博览会、旅游节、电影节、论坛、联合考古等交流频繁。()

I ____ from Mr. Smith since he moved to Shanghai

A. didn’t hear
B. don’t hear
C. won’t hear
D. haven’t heard