【简答题】空间点M(4,-4,2)所在的卦限为______,关于xoy平面的对称点坐标为______,关于z轴的对称点坐标为______。
【单选题】—What's her fist name? —_____. [ ]
【简答题】Translation 1)Drive back to the traffic lights and turn left. 2) Can you show me the way to the railway station? 3)Just pass the tall building and turn to the right.
【多选题】干粉消防车干粉驱动系统有( )干粉驱动系统等类型