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【简答题】Congested cities are fast becoming test tubes for scientists studying the impact of traffic fumes on the brain. As roadways choke on traffic, researchers suspect that the tailpipe exhausted【M1】______ ...
【简答题】When most people think of tropical islands, lined with white sandy beaches and bright blue seas, it is often the Caribbean or South Pacific that comes to mind. But for Chinese tourists who want a tast...
【简答题】能力发展的个体差异主要表现在（ ）上。
【简答题】找出定义旅游概念的关键点,谈谈你对旅游定义的认识。
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