石子密度

如何复习好小学四年级下册课文? 关于上次那个很简单的偏微分方程问题……解法中的第二行的计算是如何进行的呢……x=Φ（不好意思我不知道那个是什么符号）的话,df/dx不就应该等于df/dΦ吗 离散数学与偏微分方程哪个难 比如同济六版高等数学讲偏微分方程吗. 余下的450条在第二次订单中出货 怎么翻译 英语翻译 what will your classmates be like in 10 years' time?____ your classmates be like in 10years' time?填啥?特急! Your phone r____ three times. 有人听说过雷音翻译吗? 对很讨厌的人说的话例如：如果祢是那个喜欢背叛、犯贱哩人、请不要找我、因为我讨厌祢… 希望不要是废话 英语翻译像身份证、户口本、学历证明等的证件雷音翻译公司做的好么? 文中句子,快鲁迅小的时候,爱买书,爱看书,爱抄书,把书看作宝贝一样.还在进“三味书屋”前,他在自己的启蒙老师——一位远房叔祖父那里看了不带图的书.这位老师曾经告诉他,有一部绘图的 until作连词用于肯定句中的用法与作介词的用法有什么不同? ———a teacher , I" try to teach my students well. A:TO B:For C:As D: With 选哪个捏 电视已经开了几个小时了 翻译 The TV set 四个空 several hours ( )the TV set,please 宾语从句中可以使用分词做状语的从句么比如说：many scientists proved that having taken a little of aspirin,one could get rid of the headache that he was suffering from. 使他失望的是,他刚刚找人修过的电视机又坏了.To his disappointment,the TV setTo his disappointment,the TV set____ ____ _____ _____ _____ went wrong again 英语翻译before和after在搭配时间段时怎样区别,我觉得很难区别它们. it was June 15,in two days i would be thirty ,i feared that my best years were now behind me翻译 他们已经三十年没见面了 They—— ——each other ——thirty years [请勿依靠玻璃护栏]翻译英文 英语翻译will be 后面俩个空 --i __(can"t/couldn"t) answer the __(rest/finished).they were __(too/very)difficult for me.--i __(can"t/couldn"t) answer the __(rest/finished).they were __(too/very)difficult for me.--french __(paper/tests) are awful.--i"m __(think /sur) i"ve got a l they spoke too quickly for me and there were mang different accents 翻译 动名词有定语从句吗动名词可以被定语从句修饰吗？ to,they,high,were,for,him,too,reach 连成句子连词成句并给出翻译 主语从句,宾语从句和定语从句中的从句如果开头是动词,是不是都要变成动名词 动名词在名词后并可以改写成定语从句时,时态的变化 定语从句的先行词可以是动名词吗?He will mainly talk about getting along which is the theme that many students are interested in.比如说这句话有问题吗? There is somebody knoking at the door.Go to see________.为什么填who it is?为什么不填whom it is或who is it,请对这几种解释分别进行分析 改错题We've given him (just) about everything he (asked),whatever (else) (can) he want这四个空哪个是错的呀