如图所示，水平放置的平行金属板a、b带有等量异种电荷，a板带正电，两板间有垂直于纸面向里的匀强磁场，若一个带正电的液滴在两板间做直线运动，其运动的方向是（ ）
A．沿竖直方向向下
B．沿竖直方向向上
C．沿水平方向向左
D．沿水平方向向右
答案：D
两板间有匀强电场，当电场力等于洛伦兹力时粒子做匀速直线运动，电场线方向向下，电场力方向向下，洛伦兹力向上，由左手定则可知粒子沿水平方向向右，D对；
根据短文内容, 从下框A~F选项中选出能概括每段主题的最佳选项，并在答题卡上将该选项涂黑。选项中有一项为多余项。
I was hired to do some training for a sales team from one of the largest companies in America. There were 16 people on this team. That year their sales (for the 16 of them) were close to 250 million — that’s right, a quarter of a billion dollars! Needless to say, it was an excellent and interesting time. I decided to learn a little bit myself, so I watched them closely to see what kind of people they were and to see what common characteristics they shared. 小题2:___________ They simply weren’t a terribly serious bunch of people. Instead, they saw that life was to be enjoyed and that means they were able to laugh a little bit. Sure, there were varying levels in this but they all had a sense of humor. They were able to laugh at circumstances, and they were able to laugh at themselves. It was quite refreshing and the most important key to their success, I’m sure. 小题3:___________ They didn’t come from families that gave them a free pass into the upper rank of the business world and they didn’t get a head start from upper outside universities. What got them to where they are now? Hard work! That’s right, another example that if you put your mind to it, work hard and get in the right situation, you can achieve great things! These folks work long hours and are disciplined in the work they do. And it is paying off. 小题4:___________ They were always occupied in the learning process. During my sessions they were attentive and listening. You could see their minds processing the information. They were asking questions and applying the material to their work and their lives. They wanted to improve in any way that they could. It was also interesting to watch them in their team meetings led by their sales manager. They were very interactive and were learning from one another. None of them was above learning from a colleague. 小题5:___________ What did I see in these successful people? The same things that can make you a success as you apply the principles to your own life: a sense of humor, hard work, and a desire to learn at every turn. |