氯气有共价键吗

watch out 的用法当心,提防某人. 要怎么说,可以说 watch out for sb吗? watch out 后面是不是只能接sb 或句子, 而不能接sb 吗? Please send me an e-mail soon的同义句谢谢为了明天考试准备 一个watch用法的问题看日出是用watch the sun rise还是用see the sun rise? watch的含义和用法 watch和watches的用法 真空气氛炉如果通多种混合气体怎么控制? 在真空环境下物体可以振动吗 M-ZONE的英文全拼是什么啊? The Greens()having supper now 应该咋填吖一直不知道像这样的名词The Green后面的谓语动词应该用单数还是复数的形式 “空间合作系统（SCS）”英文全称是什么?NIME建立的SCS的英文全称是什么? One of the twins ( ) supper.A are having B is having C is having the When you arrive there,you'd better send me an e-mail as soon as _____.填一个适当的词. Send me e-mail alert when there is new buyer for my products 怎么翻译 Tom with his parents _（watch）TV when i telephoned him.怎么写? Fill in the blanks with is am are do does 1.() Tom watch TV 2.() he catching butterflies?3.() he swim?4.() you climbing mountains?5.() the plant trees?6.I() cleaning the floor7.Tom and Lucy () counting insects Tom with his family _____(live) in Nanjing now right here waiting for you这首歌是不是有中文版的啊?是不是还有首国语的啊?我记得以前看一部电视剧里有的 write a letter和 send an e-mailwrite a letter有发电子邮件的意思吗?有道题写的是 send an e-mail问是否write a letter?答案是是还是否? why not ____send an e mail I hope you can come back! watch的用法? Sadness can point?Back to the past? watch 的用法 求 What's past is past, can never go back, or come forth either.什么意思 动感地带中的"M-zone"中的M指的什么哪个单词? sarai sempre il mio unico,perché ti M ZONE动感地带动感地带如果打话费清单要什么手续?急 ti amo quest'ora.se solo这句什么意思ti amo quest'ora.se solo, come mostroto di vita.ti amo quest'ora.se solo, come mostroto di vita. 动感地带M-ZONE的M值有什么作用?这有什么用吗? 动感地带m-zone介绍谁能详细给我介绍一下动感地带m-zone的一些收费标准和其它的一些,总之介绍的越详细越好. M-zone M是哪个单词 Who( )a pet in your family?括号里是has还是have