people和knowledge有没有复数形式?如题……

people和knowledge有没有复数形式?如题…… 请问the knowledge 和 a knowledge 有什么区别 有没有begin from?Knowledge begins from practice. people有没有复数? people有没有复数? learn skills and knowledge 和acquire skills and knowledge 哪种表达对?有什么区别? practical knowledge和technical knowledge 什么区别? old people 和 elder people都是老年人的意思吗?有没有区别 knowledge和information区别 It give people some chances to those who want to learn more knowledge 和 it give some chances to people who want to learn more knowledge 哪个句子对,为什么 What kind of knowledge should be use when cloning process 这句话有没有语法错误 knowledge 看看这句话有没有错误General business knowledge relating to foreign trading• General business knowledge relating to foreign trading谢谢 想知道:香港有没有 free people 和ochirly啊?有的话在哪里? knowledge 有复数形式么 hobbies can bring people happiness,friendship and knowledge对 happiness,friendship and knowledge提对 happiness,friendship and knowledge提问 Web of Science 是Web of Knowledge的一个超集吗?如题.WoS 和WoK之间有没有超集关系呢?关于web of science 和web of knowledge 我已经了解过了,想知道的是他们之间的具体的关系哈 have a knowledge of 和 have an idea of用在“了解”这个意思,knowledge和idea用法有什么区别吗?比如：have a knowledge of / have a good knowledge ofhave an idea of / have no idea of另外,有have no knowledge of这种用法吗?