题干
My mother is a teacher．She goes to school 7：00 the morning．
A：at；on
B：at；at
C：at；in
答案(点此获取答案解析）
C
My mother is a teacher．She goes to school 7：00 the morning．
A：at；on
B：at；at
C：at；in
分子中最多有几个碳原子在同一平面上
