问题
选择题
— Who's she?
— _________________[ ]
A. She's a doctor.
B. She's a teacher.
C. She's my aunt.
答案
答案：C
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— Who's she?
— _________________[ ]
A. She's a doctor.
B. She's a teacher.
C. She's my aunt.
答案：C
CH3COO-+H+对于该平衡，下列叙述正确的是[ ]