【判断题】摄影测量所采用的五种常用坐标系中,只有地面测量坐标系为右手系。
【简答题】A. She didn't require any papers last semester. B. She was more flexible last semester. C. She grades papers very quickly. D. She isn't teaching this semester.
【判断题】双重联锁正反转线路可以实现正反转直接切换。( )
【单选题】在中低速切槽时,为保证槽底尺寸精确,可用( )指令停顿修整。
【单选题】This semester is() to a close.