用手剪剪切曲线时,一般使用剪刀的()进行剪切。
A. 剪刀尖部
B. 剪刀中部
C. 剪刀根部
D. 不确定
NORM位时,双级流量控制活门中()
A. 关断电磁阀断电,高流量电磁阀通电
B. 关断电磁阀通电,高流量电磁阀断电
C. 关断电磁阀通电,高流量电磁阀通电
操作手拉葫芦时,操作者应与手拉链条()拽动手拉链条。
A. 成8°
B. 成15°
C. 成30°
D. 在同一平面内
Which statement is TRUE concerning the gooseneck().
A. It is a sailing maneuver which brings the vessel's head through the wind
B. It connects the boom to the mast and allows the boom to swing freely
C. It is a sailing condition where there is a loss of air flow over the sails
D. None of the above