皮皮学，免费搜题
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【单选题】
加入希夫试剂显紫红色的是A.
CH 3 CH 2 CHO
B.
CH 3 C O CH 3
C.
苯酚
D.
CH 3 OH
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
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