【单选题】4gM 和 16.0gN 恰好完全反应,生成 0.2molX 和 10.2gY ,则 X 的摩尔质量为( )
【单选题】You must improve your study method _____ you may make progress in your studies.
【单选题】You must improve your study method _____ you may make progress in your studies.
【多选题】与传统的分销相比,网络的出现可以大大提高中间商的交易效率、专业化程度和规模经济效益,表现为以下哪些特点 ( )
【单选题】You must make your decision ______ from home to the company.