题目内容：
Write an outline(20 points)Read the following passage carefully and compose a ‘‘topic outline’’ for it．
What Is a Rodeo?
“Rodeo” is a Spanish word meaning ‘‘gathering place or marketplace for cattle.” A rodeo itself is a competitive contest based loosely on traditional cowboy skills of riding and roping．It consists of six major events：riding an untamed horse in a saddle；riding an untamed horse without a saddle；riding a bull；roping a calf；wrestling a bull to the ground；racing horses around barrels with women riders. A rodeo is perhaps the most genuinely American of all sports．
The first rodeo took place following a cattle roundup in the 1880s．From this informal cowboy pastime，a colorful spectacle has evolved that contains many familiar American elements--the exciting action of bucking horses and bulls，the explosive masculine environment，the hot dog stands，beer barrels，boots，jeans，and cowboy hats．
Today, most rodeos are staged in a large，flat arena that is fenced off to protect the viewing public．Grandstands are erected on two sides of the arena；on the other sides are places to hold the horses，calves，and bulls．Nearby are narrow chutes from which animals are released into the arena．On a platform a loudspeaker system is set up for the announcer, who introduces the riders and comments on the events as they happen．Near the arena are refreshment stands wh
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