四元轴烯(a)、苯乙烯(b)、立方烷(c)的分子式均为C8H8,下列说法正确的是( ) A. a的同分异构体只有b和c两种B. a、c的二氯代物均只有三种,b的一氯代物有五种C. a、b分子中的所有原子一定处于同一平面D. a、b、c均能使溴的四氯化碳溶液褪色 答案:【答案】B【解析】A、通过多个碳碳双键和叁健或环状满足分子C8H8的化合物很多,如:CH2=CHCH=CHCH=CHCCH等,选项A错误;B、不考虑立体结构, a的二氯代物一种两个氯在碳碳双键末端、一种是同一边的末端两个碳上和一种是对角末端两个碳上的取代共3种;c的二氯代物一种分别是在立方体的同一边两个碳上1、根据A句完成B句,使其意思相同或相近,每空填写一词。
1.A:What's the price of your
MP4?
B:________ ________ is your MP4?
2.A:You can read English novels.I can read them,too.
B:Yon can read English novels.So
________ ________.
3.A:The new bicycle must be
Mike's.
B:The new bicycle must ________ ________
Mike.
4.A:The little boy bought the
toy car two years ago.
B:The little boy ________ ________ the
toy car for two years.
5.A:He often made his
classmates laugh in the past.
B:He ________ ________ make his
classmates laugh.