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: _____                                                                

在上涨趋势初期，若成交量随股价上涨而放大，则涨势已成，投资者可跟进。