下列说法错误的是（　　）

      Every year people celebrate the Spring Festival in China．Usually it is in January or February．It's the most important (重要的) festival in China．So before it comes，everyone buys many things，and they often make a special kind of food called dumplings—It means(意思是) “come together”．Parents always buy new clothes for their children and children also buy presents for their parents．On the Spring Festival eve (除夕)，all the family come back home. They sing, dance and play cards．When they enjoy the meal，they give each other the best wishes for the coming new year．All of them have a good time.

如图，⊙O为锐角$△$ABC的外接圆，已知$\angle BAO=18°$，那么$\angle C$的度数为____ ．