生态灾难的具体的事例

已知,如图所示,点C、D在△ABE的边BE上,BC=ED,AB=AE,求证:AC=AD.http://hiphotos.baidu.com/%C3%CE%D4%C2%D1%A9%B6%F9/abpic/item/206b11f0c2a43c83a50f522f.jpg 如果-x的m次方×y的平方+xy的三次方-2是五次多项式,则m的平方-3m+2的值为 英语翻译He thought about going to Greece or Spain,but decid on canada.翻译成用中文来读. he thought zbout going to areece or spain,but decided on canada.用中文怎么说 he thonght about going to greece or 改错：He thought about go to Greece. LIN(X→0)(X-SINX)/X+SINX) 当a=2,b=3时,(a十b)的平方=多少,a的平方十b的平方=多少,a的平方+2ab十b的平方=多少? 怎么解释贸易这两个字? 十分钟内就要!一辆汽车上只有三分之二的座位上坐了乘客,如果乘客加6人,则已坐的座位数和空座位数的比是4：1.这辆汽车共有多少个座位?最好写出为什么这样算的原因.】 宾馆加商务两个字什么意思? 将3个相同的小球放入A、B、C三个盒子中,共有多少种不同的放法?（要列式的） 已知函数f(x)=x-1+a/e^x(a∈R,e为自然对数的底数).⑴若曲线y=f(x)在点(1,f(1))处的切线平行已知函数f(x)=x-1+a/e^x(a∈R,e为自然对数的底数).⑴若曲线y=f(x)在点(1,f(1))处的切线平行于x轴,求a的值； ⑵求 反比例函数.一二题, 反比例函数题 1、已知y与(2x+1)成反比例且当x=0时,y=2,那么当x=－1时,y=______. make a survey about 什么意思 Sonia thought about going to Beijing for vacation,but decided()HangzhouA about B to C on he made us feel really good about being there. 那个网可以在线阅读曹文轩的?急 make no mistake about it 和there is no mistake about it 中about it在句子中是作什么成分如题,还有give me a book 改成give a book to me后to me 在句中是什么成分 (A).My family thought about going to Dalian or Qingdao,but decided____Hongkong.A.onB.to难道是decide on sp.找到了这两个：貌似没用 没看到有decide on someplace的说法呀? 抛物线X平方=4Y的焦点坐标为 1.Anyone about whom I have to say more is really less.2.There was a crash that made all2.There was a crash that made all the most violent crashes of his past life seem like the sound of falling dust.求救翻译高手 读曹文轩的作品后有什么感受 Alice thought about/on going to Hong Kong,but decided on/in Hainan. 求一数学题证明过程：（请用初二知识解答,不可以用什么相似三角形之类的）在正方形ABCD中,E是AB的中点,F是AD上的一点,且AF=1 AD,求证：CE平分 这题用大一知识解过程 ax（x）为a的平方,不等于-1,则x为? 小学语文题.阅读.30分钟内回答40分. 过时间给20分. I was going to 又表示“将来时的意思吗?”如下补充问题.是两个人的对话.两人对话 A:Where you going?B:It's saturday,I was going to take Mely to my booth 为什么用 was going to 表示打算?将来?还是写错了? 写一篇两个人之间的对话 用上这些句子!1can you tell me sonething about it 2it sounds very unusual.3 so it is4 If I am not mistaken 5 I remember...6it is not far maybe five minutes' walk7 late as usual 8 are you ready to...9 let's stop 设y=f( x^2+b),其中b为常数,f存在二阶导数,求y’’