(3分)有A、B、C三种烃,它们的结构简式如下图所示:
A的名称是 ;
B的名称是 ;
C的名称是 。
(3分)A:2-甲基-2-丁烯 B:3-甲基-1-丁烯 C:2,3-二甲基戊烷
The plan was in _________ just because people were unwilling to cooperate.
A.ruins
B.pieces
C.danger
D.trouble
二硫化碳