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【单选题】
从药材中依次提取不同的极性成分,应采取的溶剂极性顺序是A.
水 → . 石油醚 → Et 2 O → EtOAc
B.
石油醚 → 水 → EtOH → Et 2 O
C.
石油醚 → Et 2 O → EtOAc → EtOH → 水
D.
水 → EtOH → EtOAc → Et 2 O → 石油醚
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举一反三
【多选题】Which one(s) of the following works is/are discussed at the meetings of the Inklings Group?
A.
Alice's Adventures in Wonderland
B.
The King of the Golden River
C.
The Lord of the Rings
D.
Out of the Silver Planet
【单选题】A culture that feels loyalties and obligations to an in-group such as one's extended family, community, or even the organization one works for is______
A.
an individualistic culture
B.
an in-group.
C.
a collectivist culture.
D.
an out-group.
【简答题】Ma Yun works as the chairman and _______ of Alibaba Group.
【简答题】Francis Bacon’s other works of the group are ________________________, ________________________, and his unfinished ________________________. ________________________ and ______________________...
【简答题】Francis Bacon’s works can be divided into three groups. The most important works of his first group include________________________, written in English; ____________, an enlarged Latin version of ____...
【简答题】His literary works are in the second group, among which the most famous is ____________.
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