题目内容
（请给出正确答案）
[多选题]
产物容易发生重排的反应有（）
A.SN1
B.SN2
C.E1
D.E2
提问人：网友dongzhuming
发布时间：2022-01-07
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B．SN2
C．E1
D．E2
题目内容
（请给出正确答案）
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更多“产物容易发生重排的反应有（）”相关的问题
第2题
（二）药物化学结构特征以下有关苯乙胺类药物的描述哪一项是错误的（）
A. 分子中具有邻苯二酚结构，易氧化变色
B. 多数具有手性碳原子，有旋光性，可供含量测定
C. 酮体为本类药物的主要杂质
D. 与甲醛-硫酸反应，形成具有醌式结构的有色化合物，可供区分具不同取代基的同类药物
E. 与三氯化铁试液不起反应
反应有重排产物第5题
Exports are either raw materials or manufactured goods. Raw materials are products of the land， such as cotton， timber or rubber. Some raw materials， such as iron ore， come from mines. These raw materials are often exported by the countries that produce them to other countries where they are made into manufactured goods. Some countries produce food for export， for example， meat， sugar， or cereals such as wheat and maize. These countries are agricultural countries. An agricultural country needs fertile land and a good climate. A cold， dry climate is not suitable for agriculture. A country which produces manufactured goods is known as an industrialized country. An industrialized country cannot always produce enough food for its own needs. In this case， it does not export foodstuffs. Instead it has to import them. It relies on exports of manufactured products and pays for imports with the money it earns from the exported goods.
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A．it cannot always produce enough food for its own needs
B．it doesn’t has fertile land and a good climate
C．it relies on exports of manufactured products
第6题
Part IV Structure and Vocabulary （） Directions: There are 20 incomplete sentences in this part. For each sentence there are four choices marked A),B),C) and D). Choose the ONE that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the center. 56. It is so difficult to _____ the bottom of the ocean because some parts are very deep.
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A．explore
B．expose
C．expect
D．explain
第7题
在海上,你看到他船的号灯为垂直上红下白号灯,垂直两盏黄灯明暗交替和红、绿舷灯,则他船为()。1围网渔船在相互邻近处捕鱼;2该船的行动被其渔具所妨碍;3该船在航对水移动
A．①
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B．①②
C．①②③
D．①③
第8题
在()中,同一层的诸因素从属于上一层的因素或对上层因素有影响,同时又支配下一层的因素,或受到下层因素的作用,而同一层的各因素基本上相对独立
A．层次分析法模型
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B．B聚类分析法
C．判别分析
