【单选题】Please______your bag orom the sea so that I can sit down.
【简答题】含有电源的闭合电路称为 。电源内部的电路称为 , 电源内部的电阻称为 ,简称内阻。电源外部的电路称为 , 外电路中的电阻称为 。
【单选题】Please _____the water tap when you have finished your washing.
【简答题】12-34. Please read through the information below before (fill) _________ in your application.