化合价与离子所带电荷数的区别

----l'm going to Qingdao and stay there for a week.---I’m going to Qingdao and stay there for a week.---________ you are there,would you please buy some books for me?A.If B.While C.Since D.As soon as为什么答案是B而不是A? 英语短语,写周末做的事,要40个单词左右. 怎样可以提高英语的口语与词汇 形容词性物主代词和名词性物主代词有什么区别? agree with sth.or agree to sth.agree to sb? 像180236一样有特别含义的词有哪些像180263那样有特别含义的词（多一些）?你是我的巧克力那样也行! You can often buy things____the shop____your way home.Afrom;on Bin;in Cfrom;by Dat;from We often buy things ____the shop on ____ way home. 意思为好像 亲自来到这个境地的词语 You can often buy something to eat and drink from the shop on your way to home.改错快 I often buy some things on my way home.__ __ __often __some things on my way home.用划线部分提问 dog too cool for school鸡蛋面膜韩币多少?看见有人说折算成人民币是七十多也有人说是一百三十多 求正确价格 too cool for school化妆品怎么样 too cool for school和innisfree哪个好用呢 求“西方列强的侵略对中国近代史的影响”应该从哪些方面讲解? too cool for school这个品牌的东西怎么样 在韩国口碑怎么样有用过的人么 too cool for school是韩国的牌子吗? 珍惜时间标语要可以放在学校教室里的,3条,要求“精髓”! Would you please---some food and drink to my home?A：bringB：take 把《匆匆》的标题改为《珍惜时间》可不可以 on my way home,I stopped__some food a buy b to buy c buying d bought 珍惜时间,用标题概括一下 on my way____,l usualli buy some food to eat A.school B.home C.to home D.work 把《匆匆》的标题改为《珍惜时间》可不可以?为什么? 请问source和origin有什么区别呢? source和origin 表“起源”的区别thank you for your help. origin与source有什么区别?希望能具体说一下 orient source origin的区别 cs起源和CS:Source的区别cs起源和CS:Source 除了画面更真实之外还有什么区别? 2013年12月份英语四级考试有哪些题型?马上要考英语了,可是我还不知道题型,这个学期都没有英语课了,也不知道四级难不难,我能不能过 2013年12月的英语四级新题型中,阅读理解有几篇?