【简答题】按照习惯规定,导体中______移动的方向为电流的方向。
【单选题】下述伤口宜用何种药粉撤敷: 一般创伤少量出血。( )
【单选题】Although they are twin sisters, they have nothing__________.
【单选题】______ they are twin sisters, they don't look like each other. [ ]
【简答题】按照习惯规定,导体中 定向 移动的方向为电流的方向。
【单选题】Strangely, the two men look ________ alike that nearly all the people think they are twin brothers. [ ]