【简答题】小题1: A new study indicates that those who watch movies in which actors smoke a lot are much more likely of smoking.(develop) 一项新的研究显示经常观看有演员吸烟镜头的人更有可能养成吸烟的习惯。 小题2: The stability of a society depends o...
【判断题】Study indicates that speechmaking ranks near the top in provoking anxiety
【多选题】下列建筑材料中,属于多孔吸声材料的有()
【简答题】岩棉、玻璃棉、木棉属于多孔吸声材料。植物纤维属于()吸声材料。
【简答题】将两个半径为a的雨滴当作导体球,当它们带电后,电势为U 0 。当此两雨滴并在一起(仍为球形)后,求其电位。