The film is very ___. Tom is very ____.

A．exciting; excited

B．excited; exciting

C．exciting; exciting

D．excited; excited

下列实例中，属于防止惯性产生危害的是：[ ]

A．跳远运动员起跳前要助跑

B．投出的篮球，离手后仍能向前飞行

C．乘汽车时，要系好安全带

D．锤头松了，把锤柄往地上撞几下，锤头就套紧了