【单选题】Let me have a rest,________?
【单选题】— Shall I buy this comic book for Dick? — . He might already have it.
【单选题】Haven't I repeated that you _____ have a holiday on Saturday if you work hard? [ ]
【简答题】She thanked him ______ second time.
【多选题】下列叙述正确的是 ( ) 。
C.
甲烷跟氯气反应无论生成 CH 3 Cl 、 CH 2 Cl 2 、 CHCl 3 还是 CCl 4 ,都属于取代反应
D.
甲烷与 Cl 2 反应生成的四种有机取代物都难溶于水
【单选题】下列有关图书续借的叙述中,哪一项是不正确的?