台式数控等离子切割机

寒武纪 晚第四纪定义晚第四纪距今多少万年?和第四纪的全新世什么关系? TV has now come to every family 意思?急. what happend这么说对吗还是说 what was happend happend是动词过去 为什么这么用 what‘s happend 还是 what’s the happend那一个正确? what happend what did it happend什么意思是病句吗? 居里夫人研究哪一种物质? 居里夫人研究物理多少年?!急! 居里夫人在哪进行科学研究每次经常在哪 我对他说他是混蛋 翻译 某突变体（立即显示该性状）自交后代发生了性状分离为什么能说明突变为显现突变 居里夫人在从事科学研究的时候,遇到了哪些困难?她是怎样对待的?她变成……的“变成”概括了什么?急,马上就用! The king was going to have new clothes _____this wonderful cloth for the great procession.A.be made of B.made into C.made from D.made of what happend sister什麼意思? i know what happend中的what是什么词 what do you get ? to my party A.to B.for C.and D.with 关于all的几个短语The passenger was tired and walked more slowly but he got home___A after all B at all C above all D in all问下各个短语的意思和句字的意思,谢谢 all的几个短语1,All in all 2,In all3,After all4,All over5,Above all 证明：(P∧Q)∨(P∧┐ Q)P. 证明：如果p^2+q^2=2则p+q≤2反证法 证明:若P^2+q^2=2,则p+q 英语翻译CFR 成本加运费CIP 运费,保险费付至D/D 票汇D/A 承兑交单L/G 银行保证书ETA 预计到港时间WDA 水渍险B/L 海运提单CIC 中国人民保险海洋运 输货物保险条款 right词组 的用法 就大概都是交际用语的,比如 all right right之类 已知2P＋3Q＝3P加Q＋5＝4,证明【P＋2】【P－3】＝2PQ＋3 single-sex environment是什么意思 语言环境是I have to post and run today.I'm heading out soon to get my hair cut.I'll catch up with you all a little later.Have a beautiful day!句中的I have to post and run today.主要讲一下POST. Love is either there or it is not ‘TheraHerb VCO-Ynflavored’这是什么意思?这是一瓶东西的名字,不知那瓶是做什么用的.是喝得?还是用的? 美轮美奂还是美仑（伦）美奂 Time as slow as snail这个语句通顺么 《黄河大合唱》,1939年作于抗日根据地　　　　　,作词,谱曲,由 个乐章组成.