如图所示，两个液压缸的有效工作面积分别为A1=50cm^2，A2=20cm^2

有材料成份能查到产品的具体牌号吗? 韦应物的赋得暮雨送李曹译文 17CrNiMo6各成分含量我记得是1.7%的铬····剩下的忘记了 这个成分的20CrMnTi材料应该属于哪个牌号以下附件是本人整理的几个不同标准的结构钢的化学成分对比.现有一来料,材料成分为（％）：0.23C,0.26Si,0.98Mn,1.25Cr,0.069Ti,＜0.035P,＜0.035S,大家对照附 征文主题：我的祖国我骄傲 我的祖国我骄傲 400字征文急需一篇《我的祖国我骄傲》征文,400字! give in ,give up 的区别? 天寒酒薄难成醉,地迥楼高易断魂.（宋）杨徽之《寒食寄郑起侍郎》 i__in london for many years,but i've never regretted my decision to move to chinaA livedB was livingC have livedD had lived 寒食描写了什么景物 寒食 描写了哪些景物 Tom move to china in 2006.he has found many differences b------chinese and american.b-----后面填什么啊. give in和give up的区别是什么 on premises是什么意思及音标 寒食古诗原文与译文 求的全诗,和译文.越全面,越详细越好. The news that they failed their driving test discouraged him,____? A.did they B.didn't they C.did it D.didn'it (怎么看,看从句?) The news that they failed their driving test disappointed him,didn't _______?填什么? 关于whichever的用法___you prefer,I will give it to you.But we haven't any other models for you to choose from.A.Whatever B.Whichever 案答是选B-I told him to take ___ he considered helpful to him and his family from everything ___I was having knock on的音标 I cross my heart and hope to 求A*TEENS的CROSS MY HEART歌词! I cross my heart I don\'t mean be long to mine baby 的中文意思 be long to mine baby 的中文意思be long to mine baby 贝壳的成分是什么 Everyone can have __ ID card,even a newly_ born baby.A、a B、an C、the D、/ what kind of music does the writer like?的回答 英语翻译【I've Hidden in Your Traces】I heard that you have forgotten about me,My is not even mentioned,Each day someone new has been brewed,and relaxed upon your bosom,But I,like it has not been over,Not even left for a day,Not like I had fall What does the writer think of marks you made? 哪里有英文的关于电路的文章 需要带中文翻译的 英语翻译the resulting spikes of current are extremely nonsinusoidal with a high contentof harmonics. 求westlife的no place that far的中文翻译