20元钱多长

若菱形ABCD的边长为2,则丨向量AB减向量CB加向量CD丨为 若菱形ABCD的边长为2,则|向量AB-CB+CD|=?最好有图, 将直线y=2x向右平移2个单位,得到新的函数关系式是_____正确答案为y=2（x-2） 为什么是 x-2 ? 为什么是减2? 已知菱形ABCD的边长为2,求向量AB－CB＋CD的模的长我知道答案是2,请说明一下AD的模为什么是2? x-(5/9x-3)+31=1.2x这个方程式怎么解 将直线y=2x向左平移1个单位,所得直线的关系式为? 初中英语的各种语法比如：doing sth做某事,这类词有什么.意思都写出来,和举例,还要注意些什么.写的多,好就给多分.如 Doing sth 做某事 例；I playing backetball 我打篮球,这样 英语中哪些词是加doing sth和sb doing sth比如说 allow就是 allow sb to do sth 或者allow dong sth高手来,不要答非所问 已知菱形ABCD的边长为2cm,设AB向量=a,BC向量=b ,DC向量=c,求a+b-c的模 哪些词后要跟doing sth 关于doing sth.的词!我急需40个关于doing sth.的词如:watching TV等!发分了! 英语里面什么样的词后面跟to do sth,什么样的词后面跟doing sththank you 已知：lgx+lgy=2lg(x-2y),则log[2^(1/2)][(x/y)]的值为____ 23、 Mark often attempts to escape _________whenever he breaks traffic regulations.A、having beenfinedB、to have beenfinedC、to be finedD、being fined24、What’s thelanguage ___ in Germany.A、speaking B、spoken C、be spokenD、to speak25、 已知lgx+lgy=2lg（x-2y）,求log（√2）x／y的值 请问It's no pleasure doing sth.有这个句式吗?有It's no+名词+doing sth.这个句式吗? 待到秋来九月八,我花开后百花杀的意思? it is no pleasure doing造句 it is no pleasure doing 这个用法对么~好像是there is no pleasure doing、但是it is no pleasure doing是书上的. 是不是it is no pleasure to dothere's no pleasure doing? It 's no pleasure doing这个句型,为什么动词要用ing形式呢?为什么不用to do sth. 几道初中英语1,Of all the sports,I prefer ____ (swim ) to _____ (skate).2,-----Could you take care of my dog while we are away?-----__________.A,It's my pleasure B,Never mind C,That's all right.D,With pleasure. in( 反义词) in的反义词 待到秋来九月八 我花开后百花杀 是什么花 in 的反义词, out的反义词 待到秋来九月八,我花开后百花杀是什么品格? 英语翻译let me sign rob pattinson歌词是OohStanding by a broken treeHer hands are all twisted,She's pointing at me,I was damned by the light comin'Over all as sheSpoke with a voice that,disrupted the skyShe said,"Walk on over,yeahto this bit of 求日本歌曲oath sign歌词,要有中文翻译 求chouchou的sign 0的中文翻译 翻译：Property was out-i wasn't old enough to sign a contract.