问题
解答题
一架直升飞机每小时飞行400千米，一列火车每小时行80千米．这架直升飞机每小时行的千米数是火车的多少倍？
答案
400÷80=5（倍）；
答：这架直升飞机每小时行的千米数是火车的5倍．
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一架直升飞机每小时飞行400千米，一列火车每小时行80千米．这架直升飞机每小时行的千米数是火车的多少倍？
400÷80=5（倍）；
答：这架直升飞机每小时行的千米数是火车的5倍．
Doing exercise can help people keep healthy. Do you often jog(慢跑)? Jogging became popular about twenty years ago and now it is a favorite way of keeping fit for lots of people. People of any age like to do it. Children can jog and old people can jog, too. They can jog anywhere. People jog around college(大学), around houses, and in parks. Jogging doesn’t need any training. Do some warm-up exercises(热身练习) and then you are ready to start. Jogging is good for health. It is good for lungs and the heart. It is easy and convenient(方便的). 根据短文内容，完成下面的表格。（每空词数不限）
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