pay+cost和spend的区别
用极坐标计算二重积分计算∫∫x\/ydxdy其中D是由曲线x^2+y^2=2ay(x...
积分区域为半个圆域,于是考虑用极坐标。令x=rcost,y=rsint,于是积分域为r<=2asint,0<t<π\/2,于是积分变为∫∫cost\/sint·rdrdt=∫cottdt∫rdr=a².不懂还可以追问。
常用不规则过去式和过去分词的英语单词有哪些?
4. 过去式和过去分词都以augh或ough结尾的动词.如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid.如:say-said-said, lay-laid-laid, pay-paid-paid...
有关过去式和过去分词的英语单词
4. 过去式和过去分词都以augh或ough结尾的动词。如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:say-said-said, lay-laid-laid, pay-paid-...
仁爱九下不规则动词表
cut-cut-cut, hit-hit-hit, put-put-put, cost-cost-cost, let-let-let, shut-shut-shut, set...5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如: say-said-said, lay-laid-laid,
小学不规则动词过去式
cut-cut-cut, hit-hit-hit, put-put-put, cost-cost-cost, let-let-let, shut-shut-shut, set...5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如: say-said-said, lay-laid-laid,
过去分词有哪些??急急急
4. 过去式和过去分词都以augh或ough结尾的动词。如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:say-said-said, lay-laid-laid, pay-paid-...
常用不规则过去式和过去分词的英语单词有哪些?
4. 过去式和过去分词都以augh或ough结尾的动词。如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:say-said-said, lay-laid-laid, pay-paid-...
那么在英语一般过去式中动词该如何变换?是不是一共句子中只能变一个...
4. 过去式和过去分词都以augh或ough结尾的动词。如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:say-said-said, lay-laid-laid, pay-paid-...
过去分词有哪些形式
4. 过去式和过去分词都以augh或ough结尾的动词。如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:say-said-said, lay-laid-laid, pay-paid-...
动词过去式过去分词 相同词形 不同读音越多愈好
4. 过去式和过去分词都以augh或ough结尾的动词。如:buy-bought-bought, fight-fought-fought, think-thought-thought, bring-brought-brought, teach-taught-taught, catch-caught-caught 5. 有的以ay结尾的动词,在过去式和过去分词中把ay变成aid。如:say-said-said, lay-laid-laid, pay-paid-...
浏阳市利咽回答:[答案] 老六..pay付钱主语多为人多于for构成词组.cost花费主语多为需要花钱的物,spend与pay相似,但也多指花时间,常与on构成词组,后跟动名词,take多指花时间,常用句式是it takes sb sometime to do sth 这题你也问,你在卖萌么..
言命13467577364问: cost pay spend都表达花费的意思,它们的用法有什么区别? - ?
浏阳市利咽回答:[答案] cost 花代价可以是钱,物,时间; spend 比较接近cost,但主要是花费,不是强调代价; pay 付钱.
言命13467577364问: spend,pay,cost这三个词的区别?
浏阳市利咽回答: spend的主语必须是人, 常用于以下结构: (1) spend time /money on sth. 在……上花费时间(金钱).例:I spent two hours on this maths problem. 这道数学题花了我两个小时. (2) spend time /money (in) doing sth. 花费时间(金钱)做某事...
言命13467577364问: pay、spend、cost的区别是什么? - ?
浏阳市利咽回答: 三者都有花费的意思1.cost 花费:主语是物比如:The ticketcost me 20 dallars.2.SPEND 花费,一般指花时间,主语为人比如:he spent 2 hours todo his homework.句型:sb spend sometime to do sth3.pay 花费,一般指花钱 ,主语为人短语...
言命13467577364问: spend,cost,take,pay有什么区别? - ?
浏阳市利咽回答: 一、辨主语这四个单词均可表示“花费”,但所用主语不同:cost 的主语通常是事或物(包括形式主语 it),不能是人;pay 的主语只能是人;spend 的主语也只能是人;take 的主语可以是事或物(包括形式主语 it),也可以是人.如: The ...
言命13467577364问: spend、cost、take、pay的区别? - ?
浏阳市利咽回答: 1、主语 take形式主语为it,spend主语为人,pay主语为人,cost主语为物. 2、宾语 take宾语为人/时间,spend宾语为时间/金钱,pay宾语为金钱,cost宾语为人/金钱. 3、结构take:It takes (sb.)some time to do sth. spend:spend time/money on sth. spend time/money (in) doing sth. pay:pay some money for sth. cost:sth. cost(sb). money
言命13467577364问: cost的用法?(和pay,spend的区别) - ?
浏阳市利咽回答:[答案] 主语是物~ 即 something cost me . 而pay 和 spend的主语都是人 即 some one pay/spend ...
言命13467577364问: pay,cost,spend用法上的区别 - ?
浏阳市利咽回答:[答案] paid three dollars for a hamburger,花了三美圆去买个汉堡 it cost me three yuan. 它花了我三元 i spend a whole day on it. 我在这事上花了一整天.
言命13467577364问: spend,cost,take和pay的区别 包括固定用法 - ?
浏阳市利咽回答:[答案] 1 spend与 pay的主语规定是人,句型是:某人+SPEND + 时间/ 金钱+ ON STH / IN DOING STH ; 某人+ PAY +金钱+ FOR STH.2 cost 主语是物;句型是' 某物+COST +某人+金钱'3 take 常见句型 :It takes sb some time t...
言命13467577364问: 一道英语单词区别的问题、急~pay 、spend 、cost 、take、之间的区别是什么啊?有多一点的~ - ?
浏阳市利咽回答:[答案] pay, spend是人作主语 cost,take是物做主语 sb. pay+钱数+for sth. sb. spend+时间或金钱+on sth./(in) doing sth. sth. cost sb.+钱数 It takes/took sb.+时间或金钱+to do sth.