相互作用能
参考答案:
将静电体系内的各带电体从所在位置,在保持各自电荷分布不变的情况下,把它们移至彼此相距无穷远,它们间的静电力所做的功,称作静电体系在原来状态的相互作用能
观点一有人说好,认为男女生要有界限。
观点二有人说不好,认为男女生都是同学,没有区别。
观点三有人说要具体分析,既要有“三八线”,但不能让“三八线”成为男女生之间正常交往的阻碍。请问:
(1)你赞成哪种观点?
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(2)如果让你参加讨论,你的观点是什么?并说明理由。
拼写单词根据句子意思,在空格中填写适当的单词,使句子完整、正确。(共8分)
小题1:February is the month of the year.
小题2:The box is very light, so I can lift it by .
小题3:I can’t help you you tell me what’s wrong.
小题4:As a citizen, we mustn’t do anything the law.
小题5:Lucy was very , so she drank two glasses of water.
小题6:Susan's parents were disappointed when they knew Susan the exam.
小题7:If I my father's birthday, please remind me.
小题8:The book to Alice because her name is on it.