1. [单选题]下列关于心率的定义正确的是( )。
A. 每秒钟心跳的频率
B. 每分钟心跳的频率
C. 每小时心跳的频率
2. [单选题]While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take?
A. Make an entry in the official logbook
B. Open the master control valves on the fixed CO2 system
C. Start the fire pump and check discharge pressure
D. Secure auxiliary condenser overboard discharge
3. [单选题]利用垫片调整轴承间隙时，要求两侧的垫片数量( )。
A. 少并相等
B. 多并相等
C. 随意
D. 少并不等
