问英语题（好难,快帮我）Waves are beautiful to look at.But sometimes the

问英语题（好难,快帮我）
Waves are beautiful to look at.But sometimes they are also harmful.They can pull down ships at sea and wash away farmlands and buildings near the sea.
The winds blow across the sea and make little waves into bigger and bigger ones.If the winds blow hard enough,the waves will be very large.In a small river,there will never be big waves.But at sea,the winds can build up great waves.
If the winds are blowing at a speed of ten kilometres an hour,most waves at sea will be about one metre high.If they are blowing at a speed of one hundred and twenty kilometres an hour,most waves at sea will be about twelve metres high.In 1933,the USN（United States Navy）reported the largest wave in history.It was 34 metres high.
Tell whether the following statements are T or F.
1.Waves can do sth harmful to people.
2.Waves are made by the winds.
3.In a small river,there will not be big waves.
4.If the winds are blowing at a speed of ten kilometres an hour,most waves at sea will be about fifteen metres high.
5.When the largest wave rose in 1933,the winds might blow at a speed of 34 metres an hour.