【单选题】【消耗次数:1】
单萜类化合物分子中的碳原子数为
10个
15个
5个
20个
25个
参考答案:
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相关题目
【单选题】 三萜类化合物一般由()个碳原子组成
①  15个
②  20个
③  25个
④  30个
⑤  35个
【判断题】 分子式为C5H10的烯烃化合物,其异构体数为6个。
①  正确
②  错误
【单选题】 二萜类化合物具有
①  两个异戊二烯单元
②  三个异戊二烯单元
③  有四个异戊二烯单元
④  五个异戊二烯单元
⑤  六个异戊二烯单元
【简答题】 萜类是一类有天然烃类化合物,由两个或两个以上[填空1]分子聚合而成,符 合[填空2]通式。
【简答题】 萜类是一类有天然烃类化合物,由两个或两个以上[填空1]分子聚合而成,符 合[填空2]通式。
【单选题】 近代物理方法证明,苯分子中6个碳原子和6个氢原子处于:( )。
①  正四边形
②  同一平面
③  同一直线
④  三角形
【判断题】 所有的胺类化合物都能生成分子内氢键。
①  正确
②  错误
【多选题】 萜类化合物的分类依据不是
①  分子中含有的异戊二烯单位数
②  氮原子的结合状态
③  分子中是否具有6C—3C骨架
④  结构中有无碳环及碳环的数量
⑤  含氧官能团的种类
【单选题】 黄酮类化合物的酸性是因为其分子结构中含有
① 
②  羰基
③  酚羟基
④  氧原子
⑤  双键
【单选题】 高分子化合物(也称聚合物)是由千万个原子彼此以共价键连接的大分子化合物,其分子量一般在( )。
①  104以上
②  108以上
③  104以下
④  102以下
随机题目
【单选题】 —Good-bye for now. —____.
①  The same to you
②  Thats OK
③  Long time no see
④  See you
【单选题】 Most electronic devices of this kind, ____ manufactured for such purposes, are tightly packed.
①  that are
②  as are
③  which is
④  it is
【单选题】 I am very ____sitting on this old, broken chair.
①  comfortably
②  uncomfortably
③  commonly
④  uncommonly
【单选题】 Tom ____more than twenty pounds on the novel.
①  spent
②  paid
③  cost
④  took
【单选题】 You can take as many as you like because they are free of ____ .?
①  fare ?
②  charge ?
③  money ?
④  pay?
【单选题】 Theorganizationhad ____ hisrequestforresearchfunding.
①  agreed
②  returned
③  objected
④  rejected
【单选题】 Our manager will look into the matter as soon as possible. Just have a little ____ after an operation.
①  wait
②  time
③  patience
④  rest
【单选题】 We solved the problem by using a computer rather than ____ it all by hand.
①  to do
②  do
③  does
④  having done
【单选题】 ____ we could not live at all.
①  If it was not for the sun
②  If it shouldn’t be for the sun
③  Were it not for the sun
④  Had it not been for the sun
【单选题】 Certainly there is no____ evidence that living together increases the chance of sickness.
①  secret
②  scientific
③  serious
④  sensitive