问题
不定项选择
如图所示，在真空中两个等量同种正点电荷的连线上有A、B两点，分别位于两个点电荷右侧相等距离的位置，A点与左边电荷的距离小于A点与右边电荷的距离，下列关于A、B两点电场强度E和电势φ的大小关系的判断中，正确的是
A EA>EB，φA>φB
B EA<
C.EA>EB，φA<φB
D.EA<EB，φA>
答案
答案：D
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如图所示，在真空中两个等量同种正点电荷的连线上有A、B两点，分别位于两个点电荷右侧相等距离的位置，A点与左边电荷的距离小于A点与右边电荷的距离，下列关于A、B两点电场强度E和电势φ的大小关系的判断中，正确的是
A EA>EB，φA>φB
B EA<
C.EA>EB，φA<φB
D.EA<EB，φA>
答案：D
When I was in the third grade, I was chosen to be the princess in the school play. For weeks my mother had helped me practice my lines（台词）. But once on the stage, every word from my head. Then my teacher asked me to change my role to be a narrator（解说者）for the play. I didn’t tell my mother what had happened that day, she noticed my and asked if I wanted to take a walk in the garden. It was a lovely spring day. We could see dandelions（蒲公英）popping（炸开） the grass in bunches（束）. I watched my mother bend down by one of the bunches. “I think I’ll dig up（挖光）all these weeds（野草）,” she said. “From now on, we’ll have roses in this garden.” “But I like dandelions,” I protested（抗议）. “All the flowers are -- even dandelions!” My mother looked at me seriously. “Yes, every flower gives pleasure in its own way, doesn’t it?” she asked thoughtfully. I nodded. “And that is of people, too.” She added. When I that she had guessed my pain, I started to cry and told her the truth. “But you will be a wonderful narrator,” she said, me of how much I loved to read stories aloud. Thanks to my mother’s encouragement, I got to know everybody had his or her own in the world, I felt proud of the role in the play.
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