【单选题】Before attempting to put out a class "C" fire involving an electrical driven centrifugal pump, you should FIRST____.
C.
secure its power supply
【单选题】某通信机房设置七氟丙烷预制灭火系统,该系统应由()种启动方式。
【单选题】某通信机房设置七氟丙烷预制灭火系统,该系统应有()种启动方式
【多选题】下列构件中,属于常见的混凝土受扭构件的为( )。
【判断题】( )冷盘配色,应考虑季节变化,”冬暖,夏冷,春秋花”,使人产生舒适愉快的感觉。
【简答题】巨血小板综合征 (giant platelet syndrome)
【简答题】If you see a person collapsed who is in contact with electricity what is the first thing you must do before attempting to switch off the supply?
【单选题】Attempting to reach his home before the storm, _____ .
A.
the bicycle of John broke down
B.
it happened that John's bike broke down
D.
John had an accident on his bicycle
【判断题】Except while taxiing very slowly, it is best to accelerate before attempting a turn. Very sharp turns or attempting to turn as both tend to exert excessive strains on the airplane, and such turns are ...