问题
单项选择题
上颌缺失属于Kennedy分类的()
A.第一类第二亚类
B.第二类第一亚类
C.第二类第二亚类
D.第三类第一亚类
E.第三类第二亚类
答案
参考答案:A
上颌缺失属于Kennedy分类的()
A.第一类第二亚类
B.第二类第一亚类
C.第二类第二亚类
D.第三类第一亚类
E.第三类第二亚类
参考答案:A
Passage Three
How do songbirds learn their complex vocalizations a. They inherited by their parents. b. They have this naturally encoded in their genes. c. They learn by listening to others of their kind. d. They learn by listening to other kinds of birds.