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【单选题】
心动期中,从主动脉瓣关闭到下一次动脉瓣开放的时间相当于A.
等容收缩期
B.
心室射血期
C.
心室舒张期
D.
心室射血期＋等容收缩期
E.
心室舒张期＋等容收缩期
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【单选题】When having a fire alarm during normal working hours, what immediate actions should be taken?
A.
Act according to instruction given in the fire plan
B.
Start the fire pump, the sooner the better
C.
Start searching for the fire to determine if it is in the engine room
D.
Everybody gathers in the safety center
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