问题一：食盐加碘可以有效地预防甲亢
问题二：食盐是比较稳定的，而说明中强调“防热”是否因为受热会造成碘的损失？
我国历史上第一部编年体通史《资治通鉴》的主编者是（ ）
Tom: Hello! My name is Tom. What's your name?
Lily: My name is Lily.
Tom: Are you new?
Lily: Yes!
Tom: What class are you in?
Lily: I'm in Class 1, Grade 6.
Tom: Me too.
Lily: Can you show me our classroom?
Tom: OK! It's on the 3rd floor.
