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【单选题】
S N 2 表示( )反应A.
双分子亲核取代
B.
单分子亲核取代
C.
单分子消除
D.
双分子消除
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【单选题】The British reporter Yvonne Ridley is thankfully now home with her nine-year-old daughter, Daisy, following her release from captivity by the Taleban in Afghanistan. But the British media has made muc...
A.
more likely to be captured
B.
more likely to be influenced by feminism
C.
more likely to be affected by her motherhood
D.
more likely to be criticized for abandoning her children
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【简答题】下列物质不是细菌合成代谢产物的一种是?
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