【单选题】半径为r的均匀带电球面1,带有电荷q,其外有一同心的半径为R的均匀带电球面2,带有电荷Q,则此两球面之间的电势差U1-U2为:
【单选题】何か質問はありませんか 。 ____ 次のべーじを開けてください 。
【简答题】Correct the underlined mistakes in the English sentence, and give the reason why you correct it in your way(改错原因可用汉语写). The meaning of the English sentence must be equivalent to that of the Chinese. C...
【单选题】半径为r的均匀带电球面1,带有正电荷q,其外有一同心的半径为R的均匀带电球面2,带有正电荷Q。设两球面的电势差为【图片】,则
【简答题】I am a writer. I spend a great deal of my time thinking about the power of language—the way it can evoke(唤起) an emotion, a visual image, a complex idea, or a truth. Language is the tool of my t...
【简答题】阅读理解 提高国民的科学素质的关键在于加强公众对科学的理解,公众理解科学,包括对科学知识的理解,对科学活动的理解,对科学与社会关系的理解,其核心是对科学精神的理解。把科学精神注入民族文化是当代科普工作者的神圣使命。表面上看,科学精神难以像科学知识那样容易普及。的确,能够把归纳出来的科学精神分成条目背下来,并不等于已经具备了科学精神,而恰恰是违背科学精神的。科学精神只能通过科学活动来体现。弘扬科学精...
【简答题】Correct the underlined mistakes in the English sentence, and give the reason why you correct it in your way(改错原因可用汉语写). The meaning of the English sentence must be equivalent to that of the Chinese. C...
【简答题】根据短文内容及首字母提示,补全单词,完成短文。 A Healthy Lifestyle, the Chinese Way T______ Chinese doctors believe we need a b______ of yin and yang to be healthy. For example, are you quiet and often tired? Maybe you have...