Look! There are some boys _____ soccer there.            [ ]

A. playing

B. play

C. plays

D. are playing

某非精密进近最后进近的下降梯度4.8%，DME台在跑道入口，进近中，机载DME显示2.43时，相应的相对高度约是多少：（）.

A.201米

B.216米

C.231米

D.246米