3、(20分)9、质量为M＝2kg、长为L的木板静止在光滑的水平面上，在木板左端放有质量为m＝1kg

2010希望之星英语风采大赛复赛成绩查询 估算一下一个行进在小雨中的人5分钟内身上淋到的雨的质量. 一个人在雨中淋5分钟后,雨水的重量 一个人在雨中5分钟,如何测量落在身上的雨的重量? Earthquakes are ______which people fear.A,not only the acts ofnature .B,not the only acts of nature.选择哪个呢?为什么? 下毛毛雨的时候骑车,是骑的慢淋到的雨多,还是骑的快淋到的雨多冬天下毛毛雨最烦了 改错If only the nature of the aging process is better understood,the possibility of discovering a mIf only the nature of the aging process is better understood,the possibility of discovering a medicine that can block the fundamental process of afin 形容身体淋了雨的成语 请问有 what do you means by?其中mean的意思是?句子翻译? 求一篇 加入学生会的英语文章 150字左右 是英语作文a letter to student union to apply for a student post 语法填空中 状语从句里after和when怎么区分 什么时候填什么 我叫luo ming zhou.求一个谐音英文名 Love is like the measles we all have to go thoug 翻译成汉语 求今年希望之星英语风采大赛颁奖典礼下中的英文歌曲.主要是回顾以前的画面时播的那首歌. cctv-10的节目中的一首英文歌曲叫什么名字cctv-10的节目中的一首由往届冠军选手演唱的英文歌曲叫什么名字 不甚感激 The little boy can hardly speak,后面写什么,反义疑问句,为什么 He could hardly walk without a stick,____?反义疑问句 Do your home work.如何翻译? .He could hardly catch the train反义疑问句He could hardly catch the train,______ _____? ---------(not do) your home work括号里填空 2007希望之星英语风采大赛的一首歌就是选手被淘汰的时候播放的歌曲,不是片尾曲I Don t Give A Damn,也不是06时的Forever Friends,求求大家了,我找了很久了, be able to do 的be应该怎么用,直接用be还是用is am are is am are 跟 be 有什么区别? 单句改错：When I （saw） her,（he） was shouting （out） for help. when he was in trouble,i was alway doing what i could()him.A.help B.to help C.helping D.helped ____the meeting himself gave us a great deal of encouragementA.he would attend B.he to attend C.he attended D.his attending 2011年度希望之星英语风采大赛晋级插曲是什么? Yan,I will make you sure of my. ___ the meeting himself gave them a great deal of encouragement.A.The president will attend B.The president to attend C.The president attended D.The president's attending there are two ( ) on the desk.a:paper;b:radio;c:radioes;d:dictionaries;选哪个,说明下理由, Water is everywhere in our life.We can't live without water.The body,plants and washing all need water.But many people always waste and pollute water.We must save water.How to save water?Let me tell you.We should close the top when we leave the wash 6级作文片段一篇,请大家帮我看看,语法,时态Having stayed in campus for years,some students start to thinking about what they can do after graduate .For instance,a part of them urgent to work after graduate .perhaps they look forward to 好心人帮我看看这篇作文啊In the age of information and technology,mobile phone plays a vital role in our daily life.Some people prefer to use the mobile phone when they are at bus or plane.The reason is that they can directly communicate w