机械原理杆组怎么拆分

Can you keep an eye （） my bag?） he couldn't explain the_____of ten years in his job history选什么?he couldn't explain the_____of ten years in his job historyA.gap B.interruption C.blank D.opening选哪一个?为什么?谢谢! since能与ago连用吗 ago可以与用现在完成时连用吗? matlab书中一个简单的画圆的代码看不懂,RT,书中较为完整的步骤是这样的：圆心角的采样设置：theta=linspace(0,2*2pi,50);半径长度的采样点设置：r=0.5:0.25:1.75;x=1+cos(theta)`*r;y=2+sin(theta)`*r;关于x和y的 凯尔康英语怎么说 凯尔英语怎么写怎么读? 英语虚拟语气选择题时态问题you look so tired ,it is time you__A go to sleepB went to sleepC go to bed D went to bed这只可以用过去时么?if she could sew，__A she make a dress B she would have made a shirtC she will make a shirtD s 一件华丽的有品位的衣服 用英语怎么说? 质量最差的服装用英语怎么说? what people wear d_____ on their likes and dislikes.因为已经有谓语动词wear,这里可不可以填depending?为什么? what people wear depends on their likes and dislikes 这句话的意思是? what people wear depends on their likes and dislikes 句中depend为什么要加s What the people there wear depends on their likes and dislikes.中为什么depend要加S 根据汉语意思,完成下列句子 What people wear（ ）（ ）（取决于）their likes and d根据汉语意思,完成下列句子1.What people wear（ ）（ ）（取决于）their likes and dislikes2.（ ）（通常说） ,people in Canada since 引导的现在完成时态句子.资料：若since引导的状语从句的谓语为 持续性动词 的现在完成时,则表示动作和状态延续到现在（说话时刻）,其表示的时间的起点应从动作发生之时算起.例如 è stato letto il giorno意大利语 Una mela al giorno leva il medico di torno.意大利语吧 英语写作题.假如10月9日是你妈妈的生日,请你用英语写一段70词左右的话语.向亲爱的妈妈说出心里话.叙述一些小事来体现妈妈对你的关心和帮助.表达对妈妈的祝福：祝妈妈健康、快乐. 格列佛游记 作者为什么讽刺之后又赞扬起他所批判的对象?拜托. 不要答非所问. It will about four days to get there.为什么用to get 其实我当时心里便已有数,这小家伙决心如此坚定,一直如此坚强,定可为天下不可为之事.这句话你认为使“我”产生如此看法的根据是什么 （ )does it take to get there?It takes four hours..怎么填A How many B How often C How soon D How along 这小家伙决心如此坚定,则天下无不可为之事.请问用一句格言或谚语表达这句话 如何让自己梦想成真 since是不是又能与短暂性动词连用,又能与延续性动词连用? 如何梦想成真? 给我打包发送一份新概念3的mp3吧, 谁能给我新概念1-4册单词MP3下载.要打包的.最好给连接 托福听力：如何筛选美剧听力材料 红海、喜马拉雅山、日本群岛的成因是一样的吗?若不是分别说出 托福听力：如何筛选合适的美剧听力材料?