It's going to be Sport Day on Friday. There are some students on the playground.

    They are doing sports. Amy is running. She can run fast. Sam is jumping. He can jump really high. Daming is playing football. He can play it very well. What is Lingling doing? She is playing basketball. She can catch the ball. But she can't catch it very well.

光的折射定律：光折射时，折射光线、入射光线、法线在____内；折射光线和入射光线分别位于法线____。光从空气斜射到水或玻璃表面时，折射光线向法线____，折射角____入射角。光垂直射到水或玻璃表面中，在水或玻璃中传播方向____。

①稀醋酸；②浓硫酸；③稀硝酸至恰好完全反应，并将上述过程中放出的热量分别记为Q_l、Q₂、Q₃．

下列关系式中正确的是（  ）