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【简答题】
（10分）烷基苯在高锰酸钾的作用下，侧链被氧化成羧基，例如 化合物A～E的转化关系如图1所示，已知：A是芳香化合物，只能生成3种一溴化合物，B有酸性，C是常用增塑剂，D是有机合成的重要中间体和和常用化学试剂（D也可由其他原料催化氧化得到），E是一种常用的指示剂酚酞，结构如图2． 图1 图2 写出A、B、C、D的结构： （1）A：____________________________________________． （2）B：____________________________________________． （3）C：____________________________________________． （4）D：____________________________________________．
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参考答案：
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【简答题】A．Because the insects are the most successful creatures. B．Because the insects give birth all the time. C．Because the insects can adapt to new situations quickly. D．Because the insects were the first ...
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【单选题】____________ they ____________ in the forest?  Yes, they are. [     ]
A.
Do, watch insects
B.
Are, watching insects
C.
Did, watch insects
查看完整题目与答案
【单选题】Which of the following is not true about insects?
A.
Insects can see more colours than human beings.
B.
Insects can see ultraviolet rays which are invisible to man.
C.
All insects have their favorite colours.
D.
The world is more colorful to insects than to human beings.
查看完整题目与答案
【单选题】Which of the following is NOT true about insects?
A.
Insects can see more colours than human beings.
B.
Insects can see ultraviolet rays which are invisible to men.
C.
All insects have their favorite colours.
D.
The world is more colorful to insects than to human beings.
查看完整题目与答案
【单选题】下列关于感受器电位的特点是
A.
具有局部电位的性质
B.
与动作电位的发生部位是同一个地方
C.
是“全或无”的
D.
不衰减传导
查看完整题目与答案
【单选题】In many countries insects are not eaten because ______.
A.
insects are very dirty
B.
insects are very ugly
C.
insects are very difficult to digest
D.
A and
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【单选题】In the war, a soldier’s life is full of ________.
A.
hazards
B.
cosmetics
C.
transfusion
D.
bioterrorism
E.
disorders
查看完整题目与答案
【单选题】下列属于烷烃的键
A.
碳碳双键
B.
单键
C.
碳碳三键
D.
羟基
查看完整题目与答案
【单选题】(真题2011-S2) 自发性气胸最常见的症状是
A.
呕吐
B.
心悸
C.
发热
D.
胸痛
E.
咳嗽
查看完整题目与答案
【单选题】适合在砂土上栽培的作物是 ( )
A.
棉花
B.
玉米
C.
花生
D.
果树
查看完整题目与答案
相关题目：
【简答题】A．Because the insects are the most successful creatures. B．Because the insects give birth all the time. C．Because the insects can adapt to new situations quickly. D．Because the insects were the first ...
查看完整题目与答案
【单选题】____________ they ____________ in the forest?  Yes, they are. [     ]
A.
Do, watch insects
B.
Are, watching insects
C.
Did, watch insects
查看完整题目与答案
【单选题】Which of the following is not true about insects?
A.
Insects can see more colours than human beings.
B.
Insects can see ultraviolet rays which are invisible to man.
C.
All insects have their favorite colours.
D.
The world is more colorful to insects than to human beings.
查看完整题目与答案
【单选题】Which of the following is NOT true about insects?
A.
Insects can see more colours than human beings.
B.
Insects can see ultraviolet rays which are invisible to men.
C.
All insects have their favorite colours.
D.
The world is more colorful to insects than to human beings.
查看完整题目与答案
【单选题】下列关于感受器电位的特点是
A.
具有局部电位的性质
B.
与动作电位的发生部位是同一个地方
C.
是“全或无”的
D.
不衰减传导
查看完整题目与答案
【单选题】In many countries insects are not eaten because ______.
A.
insects are very dirty
B.
insects are very ugly
C.
insects are very difficult to digest
D.
A and
查看完整题目与答案
【单选题】In the war, a soldier’s life is full of ________.
A.
hazards
B.
cosmetics
C.
transfusion
D.
bioterrorism
E.
disorders
查看完整题目与答案
【单选题】下列属于烷烃的键
A.
碳碳双键
B.
单键
C.
碳碳三键
D.
羟基
查看完整题目与答案
【单选题】(真题2011-S2) 自发性气胸最常见的症状是
A.
呕吐
B.
心悸
C.
发热
D.
胸痛
E.
咳嗽
查看完整题目与答案
【单选题】适合在砂土上栽培的作物是 ( )
A.
棉花
B.
玉米
C.
花生
D.
果树
查看完整题目与答案
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