火车t和z有什么区别

已知三角形ABC是直角三角形,∠BAC=90°,AD⊥BC,AE平分∠CAD,BF平分∠ABC,交AD于G,交AE于H,连结EG,求证：EG∥AC. 这两题脱式计算怎么写的.能简便的要简便 简便计算脱式计算.一共有两题计算题 不用方程解（实在不行用方程也可以）,急用!有90张电影票,如果先分给五年级,则六年级得到票的同学仅占二分之一；如果先发给六年级,则五年级得到票的同学仅占三分之一,五、六年级各有 一项工程,甲、乙合作要2天,乙、丙合作要4天,丙、甲合作要2.4天,则甲单独完成此项工程需要的天数是（    ）.A、2.8              & 只列方程不解1.有一笼鸡和兔,共35个头,94只脚,则鸡兔各多少只?2.有一项工程,由甲队单独做需10天完成,乙队单独做15天完成.如果两队从两端同时做2天,然后由乙队单独做,还需多少天完成? 222222222 (21 23:57:38)一条路按计划18天可以修完它的3分之1,如果工作4天后工作效率提高了5分之1,那么一共几天可以完成它的一半 we very much like our classroom怎样连句 We must make our planet much ( ) beautiful . 请讲解We should do as much as we can ____ our country better and more beautiful.We should do as much as we can ____ our country better and more beautiful.A.make B.to make C.makes D.making请讲解 he was born( )march 1879 用on还是in He was born on November 1st,1990.对on November 1st,1990提问 he was born ___march the third 用in 还是on He was born in Nanjing.(改为同义句) 三十九用英语怎么说? 39用英语怎么说 第三十九天用英语怎么说 49用英语怎么说 第1-第39英语怎么说 英语题47、49 请翻译下列句子,并请说明所填词的理由用适当词填空31-1 （By ） the end of the meeting ,he told a story (in) English.31-2 I’d like a piece of paper to write ( on)31-3 There is big shop (on) the other side of the road.31-4 I oft 说一个椭圆,较长的两端坐标是（0,6）和（0,-6）,并且经过（-3,2）,求椭圆的公式.有没有答案那个数字不重要. 英语,为什么49题是D? Our school is very big and beautiful(改写为感叹句) Our school is very beautiful,but it is not ver big. Our new school cafeteria is （very big and beautiful）.改成一般疑问句 our school is r﹉ big and very beautiful.填写r﹉ our school is big and beautiful同义句 在对数函数中,当a大于零,如果值域要为实数,那定义域是不是一定要为实数,中间函数的判别式一定要大于等 已知2^2x-3-2^2x+1=192,求x= http://zhidao.baidu.com/question/170796696.html 为什么定义域是实数集是使判别式小于零 初三升高一衔接班讲的,可能是不适应,看傻了,应该是最基本的含有三个实数的集合可表示为｛a,b/a,1}也可表示为｛a²,a+b,0｝求a的2007次方+b的2006次方