The teacher used some
The teacher used some__(chalk) in the class1.The teacher used some__(chalk) in the class. 答案chalk 问:chalk可是名称还是不可数?什么情况下用可数或不可数? 2.The house became__(too\quite)big for him. 答案quite 怎样区分用too 还是用quite
1)chalk(粉笔)是物质名词,因而没有复数形式-chalks.要表达复数时,就要用量词"some pieces of""a few boxes of"这种形式. 2)rather,quite,区别 解答: too, quite,都是表示程度副词,修饰其它的形容词和副词。但它们之间一般不互相修饰。它们的修饰程度大致可排列为:too > rather > quite > very e.g. The weather is too hot today. 今天太热。(热度过大,难以忍受,持一定否定意义) The weather is quite hot today.今天很热。(热度偏高,可以忍受)
一般too都用在too……to……句型中
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问:高压输电线,电线耗损的功率能不能用Q=U^2*t/R来表示?为什么?
答:可以用R=U~2/R进行计算,只有过U表示的是输电导线两端的电压,而不是变压器的输出电压,由于学生常将输入电压、输出电压、升压变压器的电压、降压变压器的电压混在...详情>>