【多选题】下列关于实验室水电使用说法正确的是()
A.
Western 实验中采用冰块制冷电转槽,需注意与电源的距离并及时处理桌面水迹。
C.
带电实验设备旁注意有无液体存放(烧杯、量筒、带冰的泡沫箱等)。
D.
易潮湿的药品保存在干燥罐内,需注意使用期限及要求。
E.
办公室用电器及插座周围不放置饮水杯,特别是盛满水的无盖水杯。
【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
【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】What are the services for Departing VIP passengers?
A.
handle baggage, travel documents and check-in
B.
special parking privileges
C.
enjoy light refreshments, food and beverages
D.
relax or work in the VIP lounge
【单选题】目前科学家把干细胞主要分为两大类:一类是多能干细胞,一类是成体干细胞。
【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