I won't go to the concert this evening. I ______ watch the NBA on TV. It's more exciting. [ ]

A. had better

B. would rather

C. ought to

D. have to

炮弹里火药燃烧产生的高温高压气体炸开弹壳后温度降低，是用_______的方法减少了气体的内能；食物放进冰箱后温度降低，是用__    __的方法减少了食物的内能。汽车发动机一般用水来冷却，这是利用了水的___    ____较大的特性。