【判断题】When diners wanted to put down their chopsticks during a meal, they would place them lengthways on a chopstick holder.
【简答题】A) One would have curly hair if they ate too much stale bread. B) One would go to prison if they put a stamp on upside down. C) One would have to shave their head to remove a bat in their hair. D) One...
【单选题】下列关于包合物的叙述错误的是
A.
一种分子被包嵌于另一种分子的空穴结构内形成包合物
E.
包合物为客分子被包嵌于主分子的空穴结构内形成的分子囊
【单选题】It seem s that many people have _________ periods of stress, with more physical and mental vigor than they had before.
【单选题】下列关于包合物的叙述错误的是
A.
包合技术系指一种分子被包嵌于另一种分子的空穴结构内,形成包合物的技术
B.
包合物能否形成及其是否稳定,主要取决于主分子和客分子的立体结构和二者的极性
E.
包合物能否形成,主要取决于主体-客体分子的几何因素
【单选题】下列关于包合物的叙述错误的为
A.
一种分子被包嵌于另一种分子的空穴结构内形成包合物
E.
包合物为客分子被包嵌于主分子的空穴结构内形成的分子囊