皮皮学，免费搜题
登录
搜题
【单选题】
近年来流行喝苹果醋。苹果醋是一种由苹果发酵而成的具有解毒、降脂、减肥和止泻等作用的保健食品。苹果酸（ 一羟基酸）是这种饮料的主要酸性物质，其结构如下图所示： 下列相关说法正确的是A.
苹果酸在一定条件下能发生消去反应
B.
苹果酸在一定条件下能催化氧化生成醛
C.
苹果酸在一定条件下能发生加聚反应生成高分子化合物
D.
l mol苹果酸与NaHCO 3 溶液反应最多消耗3 mol NaHCO 3
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】The Constitution first regulates the relationships between the central government and the state governments.
A.
正确
B.
错误
【简答题】中国民居建筑中黄土高原地区的代表民居是( )
【单选题】Two bonds have the same term to maturity. The first was issued by a state government and the probability of default is believed to be low. The other was issued by a corporation and the probability o...
A.
Because they have the same term to maturity the interest rates should be the same
B.
Because of the differences in tax treatment and credit risk, the state bond should have the higher interest rate.
C.
Because of the differences in tax treatment and credit risk, the corporate bond should have the higher interest rate.
D.
It is not possible to say if one bond has a higher interest rate than the other.
【单选题】According to the first theory, the sun and ball lightning are examples of this state of matter:
A.
solid
B.
liquid
C.
gas
D.
plasma
【简答题】Where in the essay does Hill first state the major similarity between teaching and mountaineering?
相关题目：