The direction in which a vessel is steered is the course. The path actually followed is the （）. ["route","track","heading","course over the ground"]
在什么情况下主电机应该自动切断？
人民警察在交通管理及街面巡逻时，在执勤姿态方面有哪些基本要求？
The direction a vessel is pointed at any given time is the（）. ["course","track","heading","course over the ground"]
（）是指银行在经营活动中，由于各种不确定因素而导致其损失或盈利能力下降的可能性。 ["银行风险","经营风险","系统性风险","风险损失"]
压力机有哪些保护措施？作用是什么？
