问题
选择题
下列各组中的两种有机物不属于同分异构体的是( )
A．甲醚和乙醇
B．CH3CH2COOH和CH3COOCH3
D．正己烷和环己烷
答案
答案：D
分子式相同而结构不同的化合物互为同分异构体，所以选项ABC中分别都是同分异构体的关系。D中分子式不同，不是同分异构体，但也不是同系物，答案选D。
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下列各组中的两种有机物不属于同分异构体的是( )
A．甲醚和乙醇
B．CH3CH2COOH和CH3COOCH3
D．正己烷和环己烷
答案：D
分子式相同而结构不同的化合物互为同分异构体，所以选项ABC中分别都是同分异构体的关系。D中分子式不同，不是同分异构体，但也不是同系物，答案选D。
从下面的方框中选择一个适当词填空，并将其正确形式写在句中横线上，每空一词，只用一次。
小题2: ---“Honey, I need to refresh myself. Do you mind my ____ in the living room？ ---No way!” 小题3:Computer is one of greatest _____，I can’t imagine what our life would be without it. 小题4:---Mr. Sun, could you give me some advice on how to improve my spoken English? -----The____ practice you make, the better your spoken English will be. 小题5:It’s _____ of you to help the people in need. 小题6:A low-carbon lifestyle has an effect on our daily life. People should pay more attention to saving _____. 小题7:There was a big fire in the office yesterday. _______，all the people were saved. 小题8:Our goal is ______ our environment from being destroyed. 小题9:On April 14th, an earthquake hit Yushu and destroyed its _______completely. —It’s a great pity. 小题10:Tomorrow Tom will return the book I _____ to him. . |