1摩尔某烃能与2摩尔HCl完全加成，其产物最多能被8摩尔Cl2完全取代，则原烃不可能为
丛菊两开他日泪，____ 。
——How long have you ________ your penfriend?——For five days. I received it last Sunday.
Kitty and Mary are thirsty．
