深夜作业

磷的所有含氧酸分子式?RT以及他们的化合价和酸性强弱的比较. The General Store sells clothing and many other things ( )fooda.in addition b.expect for c.apart from为什么选c, 请问高中所有无机含氧酸的结构式是什么 铝型材的大阳极氧化,和小阳极氧化问题对铝型材工艺比较陌生我们在发订单时对方告诉我：大阳极氧化就是整根型材氧化,小阳极氧化是单个零件氧化,但报价下来,大氧化只要18元,而小氧化要 汉能玻璃粉的主要用途是什么? you can day the rainy to point连词成句 point you to the can boys noes 连词成句 needs to he teach you him to sing连词needs to he teach you him to sing连词成句 which kind of,which kinds of,what kind of,what kinds of的区别与分别用法如题,还有,到底有没有后面的s啊. the kind of, a kind of, kind of, kinds of 的区别我才疏学浅,请赐教 和any kind of books还是any kind of book?any kind of 后面应加名次单数 还是复数? 硫的含氧酸有几种,分别叫什么酸, 磷元素最高价含氧酸的化学式 过磷钙酸的化学式是什么 求‘含氧酸’的化学式麻烦帮我查一下 阳极氧化铝材质会被汗液 He _______buy a bike A needs B does't need C needn't D need to -----he ---it?a does;need know b does;need to know c needs ;know d need; to know ____David _____anything to drink?A Need;/ B Needs;/ C Does;need D Do;need应该选哪一个?我觉得A和C都对啊. 石英研磨後就是玻璃粉吗? He had many___books,They are___interesting.A.kinds of,kinds of B.kinds of,kind ofC.kind of,kinds of D.kind of,kind of there are many kinds of books in his study.（对划线部分提问：划线部分为many kinds of books)----what ___in his study?空格处是is,可为什么不用are? many kinds of There are many（）books in the shop.A.kinds of B.kinds C.kind of 碳和硅最高价含氧酸酸性是由强到弱的,用原子结构解释急需高人指点.谢谢. 有两种短周期元素X和Y,可组成化合物XY3,若X原子序数为a .Y原子序数为b.则a+b不可能的是?Aa+b=16 Ba+b=30 Ca+b=24 DA+B=43 为什么 额,需加入氧化剂才能实现的有SO2→SO3吗,为什么? 在1~18号元素中,有两种元素X和Y可能形成化合物XY3,则由R形成的下列物质的化学式正确的是A．3B．4C．5D．6 Can you tell me the way to the hospital?改为同义句 Can you tell me ( ) ( ) ( ) ( ) hospital can you tell me___ ___ ___to the nearest hospital? 硅胶可用作袋装食品的干燥剂吗? 希望大家帮我起个英文名字,要时尚好听好看,我叫邓树杰,最好英文名可以和我中文名字谐音咯,要男生的哦、