问题
选择题
—When did she get injured?
— It was at midnight ____ rain was pouring down. [ ]
A. where
B. which
C. what
D. when
答案
答案：D
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—When did she get injured?
— It was at midnight ____ rain was pouring down. [ ]
A. where
B. which
C. what
D. when
答案：D
缺失，
近中舌侧倾斜，牙槽嵴丰满，上颌散在骨尖，颌间距离正常。修复前应做的工作是（）