早教吧 育儿知识 作业答案 考试题库 百科 知识分享
创建时间 资源类别 相关度排序
共找到 1363902 与到底usedtodo和was/wereusedtodoing区别在哪里 相关的结果，耗时1551 ms rss sitemap

设每公里每吨货物的基本运费为p=10,货物重量为w=20,距离为s,折扣为d,则运费f=p*w*s*（1-d）.用switchs,d的关系如下：s 数学

I ( )such a beautiful city beforeA.don"t visit B.didn"t visit C.haven"t visited D.hadn"t visited 英语

These books ___ to him. They are mine. A.isn,t belong B.doesn,t belong C.aren,t belong D.don,t bel 英语

Must I return the book this week?No,you( ).You can（）it for 20 days.A.mustn't,keepB.needn't ,borrow C.needn't ,keep D.mustn't ,borrow请解 英语

一下,为何选c,这里keep

he______ do it today.A.hasn't B.doesn't have to C.hasn't to D.doesn't have 英语

He must have learn English for three years,___?A.hasn't he B.haven't he C.mustn't he D.didn't he要理由,谢谢 英语

45.The ground was dry .There ________ any rain for months .A .hadn’t been B .hadn’t C .hadn’t had D .wasn’t 英语

matlab solve函数求解a='x=0.5*9.8*0.6^2/pi*tanh(2*pi*0.2/x)';b='y=0.142*x*tanh(2*pi*0.2/x)';c='z=0.25*y*(sinh(2*2*pi*0.2/x)+2*2*pi*0.2/x)/( 其他

inh(2*pi*0.2/x

Mary said that she ( )me for a long time.{选择并分析解释} 【重金悬赏】 A.hadn't seen B.hasn't seen C.didn't see D.could' see 英语

【考例】My little sister _____ now,but she _____ some English songs.A.can’t swim; can sing B.can’t to swim; can sings C.can swims; can’t s 英语

ngs D.can’t sw
< 11 12 13 14 15 16 17 18 19 20 >
©2023 zaojiaoba.cn 手机版 | 关于早教吧