【单选题】放射性 131 I的主要不良反应是 ( )。
【单选题】Among the following novels, only one was not written by Herman Melville. It is_____________.
【简答题】拼一拼,答一答。 1. What's this? __________________________________________________ 2. How many legs does it have? __________________________________________________
【简答题】听对话,回答问题。 1. How old is KangKang's sister? A. 14. B. 15. C. 16.