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【多选题】
薄荷是一种重要的中药，化学成分非常复杂。薄荷醇是其主要成分，其结构式如下，有关薄荷醇的叙述正确的是：【图片】A.
薄荷醇是一个二级醇
B.
薄荷醇是一个
C.
薄荷醇分子的稳定为椅式
D.
薄荷醇分子存在 p-π 共轭结构
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【简答题】数据库中的层次数据模型实质上是一种有根结点的________。
【简答题】Research shows employers appreciate young people who have lived outside ______ .
【简答题】根据对话内容，选择恰当的句子补全下列对话。 (H for Henry; J for Janet) H: Hi, Janet, Would you like to help save the environment? J: I don't know. 1______ H: Well, first, you can start by turning off the lights. J: Yes. ...
【简答题】A．Young people who want to ride a car for joy. B．Professionals who steal cars for other crimes. C．People who lack money to buy a car. D．Both A and B.
【单选题】Why did someone argue that the independent schools help perpetuate economic and social division?
A.
Because they are very expensive and the ordinary people cannot afford the tuition & fees.
B.
Because some of them have a near 100 percent university acceptance rate.
C.
Because half of all “Oxbridge” entrants are educated at independent schools.
D.
All above-mentioned
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