列竖式计算下面各题       

283×26＝ ____ 33×66＝____ 84×59＝____ 26×47＝____

 54×25＝ ____ 21×144＝____266×77＝____319×36＝____

    In many parts of the world, there are four seasons: spring, summer, fall and winter. In the U.S., there are only three: football, basketball and baseball. If you want to know what season it is, just have a look at what people are playing.

    For many people in the U.S., sports are not just for fun. They're almost a religion. Thousands of sports fans buy expensive tickets to watch their favourite teams and athletes play in person. Other fans watch the games at home. The most devoted sports buffs never miss a game. Many a wife becomes a “sports widow (寡妇)” during her husband's favorite season.

    America's devotion to athletics has created a new class of wealthy people: professional athletes. Sports stars often receive million -dollar salaries. Some even make big money appearing in advertisements for soft drinks, shoes and even toiletries (化妆品).

    Sports are an important part of Americans' culture. Throughout their school life, Americans learn to play many sports. All students take physical education classes in school. Some try out for the school teams, while others join school sports leagues. Athletic events at universities attract scores of fans and benefit the whole community.

长江、黄河共性特征叙述错误的是（    ）