You are standing the wheelwatch on entering port and the Master gives you a rudder command which conflicts with a rudder command from the Pilot.What should you do().
A. obey the Master
B. obey the Pilot
C. bring the rudder to a position midway between the two conflicting orders
D. ask the Pilot if he relinquishes control
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重要电力客户是指在国家或者一个地区的社会、政治、经济生活中占有重要地位,对其中断供电可能造成()、社会公共秩序严重混乱的用电单位或对供电可靠性有特殊要求的用电场所。
A. 人身伤亡
B. 较大环境污染
C. 重大政治影响
D. 较大经济损失
腰椎间盘突出症最易发病的椎间隙是()
A. 腰2~腰3
B. 腰3~腰4
C. 腰4~腰5
D. 腰5~骶1
E. 胸12~腰1
对家禽应选用()。
A. VD1
B. VD2
C. VD3
D. VD4