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提问人:网友cheng778
发布时间:2022-01-07
[主观题]
奥类成分多存在于___高沸点部分,呈兰、紫色,不但溶于石油醚,还可溶于强酸(60~65%硫酸)。
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查看官方参考答案
A、five two seven one nine seven three
B、five two eight one nine seven three
C、five two eight one six seven three
D、five two eight one nine six three
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