不管
如图所示，一平行板电容器与一电源相连，在A、B两极板间的某点0处，有一带电油滴恰好静止，此时两极板间的电势差为UAB，现将A板缓慢向上平移，则（ ）．
如图所示，一平行板电容器与一电源相连，在A、B两极板间的某点0处，有一带电油滴恰好静止，此时两极板间的电势差为UAB，现将A板缓慢向上平移，则（ ）．
Practice 12 (1) Whatever its underlying reason, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the home there is an obvious need to control litter and was
Practice 12 (1) Whatever its underlying reason, there is no doubt that much of the pollution caused could be controlled if only companies, individuals and governments would make more efforts. In the
_____ people say, I believe he is as innocent as a baby unborn.
\_\_\_\__ people say, I believe he is as innocent as a baby unborn.
Large quantities of water _____ for irrigation.
Large quantities of water \_\_\_\__ for irrigation.