题目

如图4所示，将带正电的甲球放在不带电的乙球左侧，两球在空间形成了稳定的静电场，实线为电场线，虚线为等势线。A、B两点与两球球心连线位于同一直线上，C、D两点关于直线AB对称，则( ) 图4 A．A点和B点的电势相同 B．C点和D点的电场强度相同 C．正电荷从A点移至B点，电场力做正功 D．负电荷从C点移至D点，电势能增大For many parents, raising a teenager is like fighting a long war, but years go by without any clear winner. Like a border conflict（冲突）between neighboring countries, the parent-teen war is about boundaries: Where is the line between what I control and what you do?Both sides want peace, but neither feels it has any power to stop the conflict. In part, this is because neither is willing to admit any responsibility for starting it . From the parents’ point of view, the only cause of their fight is their adolescents’ complete unreasonableness. And of course, the teens see it in exactly the same way, except oppositely. Both feel trapped.In this article, I’ll describe three no-win situations that commonly arise between teens and parents and then suggest some ways out of the trap. The first no-win situation is quarrels over unimportant things. Examples include the color of the teen’s hair, the cleanliness of the bedroom, the preferred style of clothing, the child’s failure to eat a good breakfast before school, or his tendency to sleep until noon on the weekends. Second, blaming, the goal of a blaming battle is to make the other admit that his bad attitude is the reason why everything goes wrong. Third, needing to be right, It doesn’t matter what the topic is—politics, the laws of physics, or the proper way to break an egg –the point of these arguments is to prove that you are right and the other person is wrong, for both wish to be considered an authority—someone who actually knows something—and therefore to command respect. Unfortunately, as long as parents and teens continue to assume that they know more than the other, they’ll continue to fight these battles forever and never make any real progress1.Why does the author compare the parent—teen war to a border conflict?A.Both can continue for generationsB.Both are about where to draw the lineC.Neither has any clear winnerD.Neither can be put to an end2.What does the underlined part in Paragraph 2 mean?A.The teens blame their parents for starting the conflictB.The teens agree with their parents on the cause of the conflictC.The teens accuse their parents of misleading themD.The teens tend to have a full understanding of their parents3.Parents and teens want to be right because they want to ________A.give orders to the otherB.know more than the otherC.gain respect from the otherD.get the other to behave properly