恒牙萌出顺序为（）
A.中切牙→侧切牙→尖牙→第一前磨牙→第二前磨牙→第一磨牙→第二磨牙→第三磨牙
B.第一磨牙→中切牙→侧切牙→尖牙→第一双前磨牙→第二前磨牙→第二磨牙→第三磨牙
C.第一磨牙→中切牙→侧切牙→下颌尖牙→第一前磨牙→第二前磨牙→上颌尖牙→第二磨牙→第三磨牙
D.第一磨牙→中切牙→侧切牙→第一前磨牙→尖牙→第二前磨牙→第二磨牙→第三磨牙
E.第一磨牙→中切牙→侧切牙→第一双前磨牙→第二前磨牙→尖牙→第二磨牙→第三磨牙
参考答案：C
| 完形填空。 | ||||
| The Spring Festival is the Chinese New Year's Day. It usually 1_ in February. Everyone in 2_ likes the Spring Festival very much. When Spring Festival comes, Li Lei usually 3 his parents clean their house and do some 4_ and other housework . 5 that day 6__ in China eats 7__ , New Year's cake and some other 8__ food . Li Lei like New Year's cake , but Wang Lin says jiaozi is better than New Year's cake. The Chinese people 9 the New Year's cake and jiaozi in their houses. 10 _ happy they are! | ||||
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