A、<img src="https://learning.mhtall.com/upload/uc_course/1843/632217BAE0EE6666A7EB30180A9A85C6DA7A7395.png" alt="">
B、C2H2
C、<img src="https://learning.mhtall.com/upload/uc_course/1843/365762F0B9B6F40E80114E8C1F1369D57C091481.png" alt="">
D、 CH3COOH
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