如图所示为定量液压泵和定量液压马达系统。

5.The first English class I taught The bus is leaving soon为什么要用is leaving? Tom is leaving for Shanghai soon.的同义句. （初中英语）—The train is leaving right now,but David hasn’t arrived yet.—Well,he said he（）here on time.A.cameB.will comeC.would comeD.had come为什么不能选B,要有解析. The train is leaving right now but David hasn't arrived yet The train is leaving right now but David hasn't arrived yet. --- Well, he said he （get）here on time. Two policeman happened _____ the traffic at the crossroads when his car was hit by a drunk driver.A、to direct B、to directing C、 to be directing D、to be directed traffic driver RT the drunk driver is to blame for the traffic jam occurring yesterday这个句子对吗? 高中定语从句：The drunk driver is to blame for the traffic jam ___ yesterday.A. that occured B. occured选A.为什么不能省略that? big and round什么意思嘛(=@__@=)? be round and sweet中文意思 round and round嘛意思? 英语高手帮我翻译一段专业英语The rationale for this procedure is to minimize the threat to entire herds, should there be an outbreak of disease.Terminology may differ between farms or areas. For example, nursery may be designated as a we social role这个短语大多数情况下怎么翻译原句是what are the social roles involved in this economic到底是翻译成社会角色还是社会任务?我也不懂.可是教材上就这样写的.是社会文化的一门课.这里到底怎 改错,下列各题中有一处错误（英语）1.Does Christine like grapes?Yes,she likes.2.Do you want any milk?No,I don't want them at all.3.He is reading a magazine,but she doesn't. 英语改错题 有八个错误After participating in his first robot-making competition,Nigel spent the next two months rebuilding his robot.During this time Nigel finds out about the prizes for the competition or about another competitor,Alicia,fro 英语翻译 round是什么意思?急啊!~~~ 谁知道round是什么意思聊? round是什么意思,求回答, round 什么意思啊!急用 round的意思?快點! There is nothing on the table.(改为同义句)There is （ ）（ ） on the table. There is nothing on the table.(改成同义句） 用适当的关系代词或副词填空1.The man ____we just now is the visiting scholar from Britain.2.The millionaire____son ran away from home two weeks ago has made a pubic ap-peal.3.We got on the first bus____was waiting there.4.They visited the a crowd of people gathered round him这里的round是作什么词用? 麻烦英语达人帮忙翻译一下简单的短对话.Z：这周周末准备去哪里玩啊?H：我有一个很棒的计划,我们出去野餐怎么样?Z：真的吗?这个消息让我很兴奋.需要做一些什么准备?H：很简单,几个很要 round n’ round 麻烦各位英文达人.Some people hear their own inner voices with great clearness.And they live by what they hear.Such people become crazy,or they become legends ...1有些人能清楚地听到自己内心深处的声音,并以此行事.这些人 round的中文意思只是round一词意思 Round and round the house went the crowd.为什么译成：人群围着那所房子一圏又一圈地转.怎么看着像房子围着人群转啊! round意思