h2s与h2so4

人类有可能穿梭时空回到过去吗?最好能有一个科学的解释.若能,请解释为何我们至今没有发现一个从未来来的人? CRM客户关系管理系统是指什么啊? It seem s to rain It seems to love 《少年不戴花》——影评 it seems to be rain.这个句子对不对,为什么?不要不肯定的答案,谢拉 It seems to rain.(改为同义句）It seems that it's()()(). it seems to be rain可不可以去掉BE啊为什么?可不可以to be都去掉?回答正确马上给分 高分求一首英文歌,开头是 Do you know ? i must going第二句貌似是什么to a place for the happy memory中间还听到一些,有over the green hills...；I'll be there waiting for you; dry your tears konw you must fight for me；最后 Tell the children not to pick the wild flowers ____very nice ,which might be poisonous.答案为smelling ,如果选项中有smell能用吗 英语翻译 There must be an angel with a smile on her There must be an angel with a smile on her face,When she thought up that I should be with you. the two sisters and their mom look the same改为同义句the two sisters ____ ____ their mom nuclear family extended family和 DINK fanmily分别有什么好处 Aren't you confusing...的中文翻译 谁能提供我一篇关于dink family 的英语论文,如题 求助英语翻译“我期盼早日能成为你们中的一员”谢谢! I hope you will be my I hope all will be fine! If I can't finish my homework today,I.__do it onSunday.a.will have to.b.need.c.need to. Since you are not a child any longer,you should behave like an adult.保持句意不变Since you are ____ _____ a chlid ,you should behave like an adult. since you are not a child ago,you should be like an adult -You should try to get ___ them by yourdself. You are not a child any longer. 使用显微镜看字是否将字倒置?用显微镜看字时,用不用把字倒过来? 在显微镜视野中文字是否颠倒? he hasn't to finish his homework today这句话错在哪? he hasn't to finish his homework today stop to talk.the teacher is coming 改错 He is clever.He can finish his homework___(easy) 英语翻译地道点可另添加意思只要意思对语句美 原谅纯洁心灵的我. 早上一觉醒来,儿子拼命的往我身上靠,睡到我这边来.我喊他,你再往妈妈这边睡,妈妈要滚下去了.结果,老公转身问,你要去孵蛋蛋啊?(⊙o⊙)…哪跟哪啊?我要滚下去和孵蛋蛋没有什么音似吧. 请我吃蛋蛋面,是什么意思大神们帮帮忙 羌的读音是什么? 把一般显微镜倒置了,会观察到什么现象?