题目

The world has changed and being intelligent isn’t normally equal to being a successful person. Look at the example of the blue whale : it has a huge brain, but it still doesn’t know how to avoid whalers or use its large size and weight to deal with those who try to use their body for profit. Scientists hold an opinion that the blue whale just likes some highly intelligent people who fail to succeed. Those highly intelligent people can’t succeed in life because they can’t communicate well with the world around them. Intelligence is a word in life that makes you think you are better than一艘轮船先向正东方向航行2小时，再向西北方向航行 t小 时。船的航速是每小时25千米。试用关于 t 的代数式表示船离出发地的距离；