【单选题】Passengers may retrieve their items from the overhead locker ______ the safety belt sign has been switched off.
【单选题】把一小块钠投入盛有煤油和水的烧杯中,可以观察到的现象是 ( )
C.
钠会在水和煤油的交界面上下浮动,直到反应结束
【单选题】不同类别的VIP客户发放不同卡面的VIP卡,总行级VIP客户发行绿卡贵宾金卡,分行VIP客户发行()。
【多选题】The VIP passengers have separate from the _________ and with the option of ________ right up to the door.
【单选题】We learn from the text that______.
A.
the passengers will have a morning flight
B.
they will have meals during the flight
C.
the plane is going to fly across a mountain
【多选题】下列关于实验室停电时实验设备的使用说法正确的是()
A.
所有大型设备如共聚焦、qPCR等,需拔掉电源。
B.
超低温冰箱、孵箱于停电前拔掉电源,来电稳定后及时给电
C.
纯水机、分析天平、pH计长期停电之后要进行校准。
【简答题】As a qualified flight attendant, how to deliver beverage service to economic and VIP passengers?
【判断题】VIP lounge is only for the VIP passengers