A. 在进口处应有引导栅栏,站台应有防滑措施; B. 栅栏门应向内外两个方向开; C. 栅栏门的内侧应设立止推块; D. 栅栏门开启方向应与乘客行进方向一致。
A. is flowing towards the land B. is moving towards the ocean C. level is not changing D. level is rising because of heavy rai
A. 音频处理辅芯片 B. CODEC C. MIDI电路 D. 运放输出芯片