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【简答题】
可以用 1 H核磁共振波谱来区分化合物CH 3 CH 2 CH 2 COCH 3 和CH 3 CH 2 COCH 2 CH 3 ，因为______。
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皮皮学刷刷变学霸
举一反三
【单选题】Because Ireland is an island geographically near the mainland of the United Kingdom, English rulers have fought since the Middle Ages to retain political control over it. Attracted by the lush farmlan...
A.
They occur only in England.
B.
They occur only in military buildings.
C.
They occur in England and Northern Ireland.
D.
They occur when public figures talk about Ireland.
【单选题】John Milton wrote a number of pamphlet s defending the Engli s h people. Among the follo w ing works which i s not pamphlet?
A.
Defence of the Engli s h People
B.
Second Defence of the Engli s h People
C.
L'Allegro
D.
Areoppagitica
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