问题
选择题
Tom has _______uncle.He is _________old man. [ ]
A.a,a
B.an,an
C.a,an
D.an,a
答案
答案：B
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Tom has _______uncle.He is _________old man. [ ]
A.a,a
B.an,an
C.a,an
D.an,a
答案：B
颊侧根分叉病变Ⅱ度，松动Ⅰ度，有叩痛，冷诊敏感。X线片显示：