题目内容

逻辑题。
1. A man sells water. What does he first think of when he sees a river?
    Answer: _____                                                                
2. A car travels at a speed of 40 mph over a certain distance and then returns over the same distance
    at a  speed of 60 mph.What is the average speed for the total journey?
    Answer: _____                                                                
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