题目

Many times we spare no effort at work, 【1】(offer) hours of overtime by ignoring our family life. We spend time with people who we have nothing in common with, and attend social【2】 (activity) we have no interest 【3】. We always find ourselves living our lives in the way that pleases and impresses others instead of being ourselves. In fact, for the majority of people, they only think about 【4】(they) 99% of the time, and 【5】 (rare) give us a second thought, as a result of 【6】we often end up unhappy and feeling out of place.In view of this, it’s time to think about ourselv真空中有两个静止的点电荷，它们之间的作用力为F，若它们的带电量都增大为原来的2倍，距离减少为原来的1/2，它们之间的相互作用力变为 （   ）A．F/2            B．F            Ｃ．4F    　         Ｄ．16F