二项式各项系数之和

从今年5月1日起,我国在室内办公室内公共场所实行全面禁烟,请你为校园内的“禁烟提示牌”编写一条温馨提示语.要求：1符合场景.2语音表达简明,生动,得体；3不超过20字 good afternoon,miss green 美国第一届总统的英文名我要查找美国第一界总统的传记 卧床的英文 make the bed 的中文 There was e______ clean air ,land and water.求求你们了 用I the bed make can what组成英语句子 安全温馨提示语大全煤矿工人安全温馨提示语 谁知道交通安全温馨提示语? 我想问一下考四级所需要具备的条件 那支铅笔英语怎么讲 考四级的条件 这是一支铅笔的英文 请问考大学四级英语需要什么条件?我是中专生 是have the air polluted 还是 have the air pollution? 考英语四级有什么前提条件限制?例如年龄年级段? This is a car race near our town every year.In1995,there was a very big race. 是 We sell our things at a very good price.还是 We sell our things in a very good price.还是 We sell our things with a very good price.是 They have many things at girls.还是 They have many things to girls.还是 They have many things for girl To our surprise the rich man went there on foot _____car Ainstead Binstead of byTo our surprise the rich man went there on foot _____carAinstead Binstead of by BEC要求初级要有公共英语四级的水平,那么是不是要考公共英语四级呢?根据BEC考试大纲的要求,学习BEC初级需要有公共英语四级的水平；中级需要有大学英语四级到六级的水平；高级需要有六 _ the street and you will see the hospital A.Go cross B.Go across C.To across D.Across Cross the street turn right and then walk straight on（改为同义句）__ __ the street and then go__ __ 《海底两万里》英文简介,一千字左右的 have you ever driven a bmw DIRVE 后为什么加N 详细解释这种单词后加N的句子谢谢帮助 《海底两万里》的英文怎么说?leagues 第一届真正意义上的世博会是那一年在哪个城市举办的 Rice,air and water ( )all important for us is or are Rice,air and water ( )all important for us is or are 应该是is吧 讲明白哦 All the water,the rice and the air ( )be important for us 英语二选一选择题.Air and water ( ) important.【is；are】 情话,骗子说傻瓜听是情侣网名 有没有另一半的网名 现在就想知道 Water and air ( ) important.A.has B.is C.have D.are