如图所示，描述晶体熔化过程的曲线是（　　）

下列各项产业群项目中，不属于化学研究范畴的是（ ）

阅读下面短文。然后根据括号中所给汉语意思写出单词并用其正确形式填空。每空一词。

Dear Lingling,

    I'm happy to get your ____（邮件）. This is a ____（照片） of my new school. It's a nice school. There are ____（绿色的） trees everywhere. This is my classroom. It's very big. I'm in Class ____（五）, Grade Seven. There is a ____ （电脑）, a clock and some desks in it. That is a ____（图书馆）. There are many books in it. The playground is very big, ____（也）. We can play ____（棒球） with our friends. Mrs. Green is my English teacher. I like ____（她的） class very much.

    My phone ____（号码） is 879-7659. Please call me.

右图反映了人体内的某种生命活动。下列选项中正确的是（ ）

某运动型饮料的成分含量如图所示，其中钾、钙、钠指的是（  ）