下图是对四个实验绘制的图像，其中实验结果与图像正确的是(  )

A．某温度下，向一定量接近饱和的硝酸钾溶液中不断加入硝酸钾晶体

B．将稀硫酸滴入一定量的BaCl₂溶液中

C．将一定质量的氯酸钾和二氧化锰加入试管中充分加热

D．向pH为13的NaOH溶液中加水稀释

用括号内所给单词的适当形式填空。

小题1:Our headmaster asked us to learn from _______ (hero).

小题2:Sandy drew _______ (beautiful)of all the students in the drawing competition. 

小题3:As teenagers, you shouldn't care only about _______ (you)but think more of others.

小题4:It's _______ (use)to talk too much but do too little.

小题5:He felt even _______ (ill)after he took the medicine.