【单选题】下列关于炔烃和烯烃的叙述中,正确的是()。
A.
炔烃和烯烃由于都含有不饱和键,所以化学性质相同
D.
烯烃和炔烃的鉴别试剂是硝酸银或氯化亚铜的氨溶液
【多选题】在泰国旅游时应该注意的禁忌有( )。
B.
购买佛饰时,禁止说购买,必须说”求租、尊请“
【单选题】比较烯烃与炔烃的亲电加成反应的活性()。
【单选题】Stereotypes usually result from ______.
D.
knowledge and experience
【判断题】People’s stereotypes of certain group of people usually remain unchanged.
【判断题】Stereotypes are usually based on a visible characteristic such as a person's age, gender, or race.
【判断题】Stereotypes are usually false.
【单选题】比较烯烃与炔烃的催化加氢反应的活性( )。
【判断题】Stereotypes of men are usually more positive in societies than stereotypes of women.