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【单选题】
氧化苦参碱在水中溶解度大于苦参碱的原因是A.
属季铵碱
B.
具有半极性 N → 0 配位键
C.
相对分子质量大
D.
碱性强
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反馈参考答案：
举一反三
【简答题】Have you ever heard the saying 'If you want a friend, be one'? If you want to make friends with others, you should be friendly to them first. Here is how one new teacher made friends with the students...
【简答题】小叶榕是 乔木 。
【单选题】If you want to make ,you ought to be to people.
A.
a friend;friendly
B.
friends;friend
C.
friendship;friendly
D.
friends;friendly
【单选题】He enjoyed the dessert so much that he accepted a second ______ when it was offered.
A.
load
B.
pile
C.
helping
D.
sharing
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