单项选择题
A.小苏打B.纯碱C.苛性钠D.烧碱
A.-OH B.-CHO C.-COOH D.-Br
A.碳碳单键 B.碳碳双键 C.碳碳三键 D.碳碳四键
A.0.25mol/L B.0.5mol/L C.1mol/L D.2mol/L
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