【单选题】“断”字右边的“斤”它左边的撇属于哪种撇?( )
【简答题】He spoke so loudly so as to made himself h_____.
【单选题】双轴系的轴线应保持与船舶纵舯剖面( )。
【简答题】He spoke English so well that I took it for granted that he was an American.
【判断题】周期信号的频谱为连续谱,非周期信号的频谱为离散谱。
【单选题】在下列选项中,()对政府间关系需实现三大变化的认识是错误的。
【判断题】周期信号的频谱为离散谱,非周期信号的频谱为连续谱。