按压力表检定规程规定，用来测量特殊介质的压力表的表壳、衬圈或表盘上应涂颜色标记，氧气压力表应涂有（）的“禁油”字样。

A、天蓝色；

B、深绿色；

C、黄色；

D、白色。

We were sad to learn that several students were ____ by a car yesterday.

                                                                                                                                    [ ]

A. hit out

B. knocked over

C. run across

D. picked up