(位-1)x1+x2+x3=0

我要点康乃馨的特点介绍,几段话介绍急 康乃馨叶子的特征 鸡冠花和康乃馨有什么不同的特点? 英语：填空题：What about_____swimming 英语翻译公路特别是高速公路是一种特殊的商品，是国民经济的重要命脉，它具有建筑产品的一切经济属性，公路建设又是国家最主要的基础产业之一，公路建设项目只有实行招投标制度才 你可以先制定一个计划翻译英文 插旗是什么意思大神们帮帮忙 插旗代表什么意思求大神帮助 插旗是什么意思··什么情况插什么样的旗啊···谢谢了,大神帮忙啊 1.water is a substance essential to our life.2.water that is essential to our life is a subtance.两个句子都没有错吧?第一句子有点不好理解啊, Excuse me,is this seat taken?--------.The man sitting here 2 minutes ago has just gone for somewater.A I don't think soB I'm afraid soC.I don't knowD I hope not 意思knowledge is to us what water is to life 英语翻译一天,Bob和Mary放学一起回家.在回家的路上,他们发现一只受伤了的小狗.他们连忙把它送到了宠物医院,小狗的伤没什么大碍.不一会儿,小狗的主人来了,她微笑着对Bob和Mary说谢谢,Bob和Ma Is the boy your brother and your cousin找出错误并改正 赵薇的太阳旗事件什么意思 Jim has lived here ( ) last year .A./ B.for C.before D.since 本句的意思是?本句有何考点及语法? 根3/sin20°-1/sin70°化简~ 2012年玄武区物理一模,麻烦把31和32题的答案发过来.Thank 灰姑娘好词好句 After hearing the bad news ,he seemed ____.A.sad B.to sad C.sadly D.be sad 求解cos100 cos140 cos160的值 母亲是(),是();我们是(),是()造句 have you ever seen a moon that looks unbelievably big?中文翻译 Mum looks much _____(sad)after hearing the bad news . 在课堂上用英文自我介绍?老实布置作业说用英文介绍自己 要高中水准的 不能太长 我好容易背~ 在课堂上他们彼此做了自我介绍 用英语怎么翻译? 课堂上,用英文简单的介绍自己我的内容是：我叫XXX,今年17岁.我是一个比较文静的大男孩,平常比较害羞,但是我长得十分帅.我平时喜欢读书和打篮球,我的偶像是卡隆巴特勒(Caron Butler )、凯文 Last year,we had an English teacher from the United States.We called him Mr.Black.He often told us,“English is very useful in the world.” He taught us very well.He was strict with us all.In class he always gave us more time to speak English.At fi This _______ is the most hardworking man I have ever seen在_______上填上单词 They each have a watch(改同义句)_______ _________ ________has a watch. After hearing the news.Everyone jumped up and down in_____(excite) 求2011年上海物理卷答案