问题
多项选择题
上颌牙弓阻力中心的位置，下列描述何者正确 （）
A.正中矢状面上
B.尖牙根尖高度
C.双尖牙根尖高度
D.第二双尖牙前后
E.第二磨牙前后
答案
参考答案：A, C, D
搜题请搜索小程序“爱下问搜题”
上颌牙弓阻力中心的位置，下列描述何者正确 （）
A.正中矢状面上
B.尖牙根尖高度
C.双尖牙根尖高度
D.第二双尖牙前后
E.第二磨牙前后
参考答案：A, C, D
Nick is my pen pal. He is 12 years old. He is from Canada. He lives in Ottawa. He speaks English and French. He likes science best. He likes Chinese, too. And he says he can speak a little Chinese, but he can’t write in Chinese. Nick likes sports, too. He likes swimming best He goes swimming on weekends with his father. He says he can swim very well. He doesn’t like Physics. He thinks it too difficult. Nick has a big family. There are eight people in his family, his grandpa, grandma, father, mother and his brothers and sisters. He has two brothers and two sisters. They are Bob, Tim, Jane and Susan. They are happy!
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