---What are you going to be when you grow up?

---I am going to be ___pilot. It is ___exciting job.

A．a; a

B．a; an

C．the; an

D．a; the

下列现象中，不属于利用惯性的是[ ]

A．锤头松了，将锤柄在地上撞击几下

B．用手拍打衣服上的灰尘

C．树上熟透的苹果，沿竖直方向落下

D．运动员采用助跑跳远