下列哪一项可能会造成掘进机截割头不转动()。
A.未开喷雾
B.油压不够
C.截割过负荷
参考答案:C
The boy’s foolish question ______ his mother who was busy with housework and had no interest in talking.
A.intrigued
B.fascinated
C.irritated
D.stimulated
用雷达观测法实测风流压差,调整电子方位线与固定孤立物标相对运动轨迹平行,如电子方位线偏在航向线右面5°,罗经差2°W,则实测风流压差为()。
A.+5°
B.-5°
C.+3°
D.-3°