雪白雪白照样子，写词语

刚买的鱼为什么一直往水面上游?昨天刚买的鱼,今天早上刚换的水,鱼为什么一直往水面上游? 世界上游得最慢的鱼是什么 基坑开挖边坡稳定性怎么验算,能给个例子吗? they are very large and are on the second Diffusion coefficients of Br2,HNO3 and PdCl2 in graphiteM.B.Dowell,D.S.BadorrekCarbonVolume 16,Issue 4,1978,Pages 241–249 Look at those are frowers.这个句子对吗? 有人知道这个鸟身上的羽毛是怎么做的吗?有人知道这个鸟身上的羽毛是怎么做的吗? 为什么鸟有羽毛? After I sit down,a____(four)man stands up to speak应该填什么?前面有个"a".... our teacher often has much work to do.(改为同义句) 翻译:the blind man then sat down and the dog got up on the seat next to him. he lay dowand put his head on the leg of the blind man. he was very comfortable and soon fell asleep. 请问有没有“hope sb to do sth”这样的用法?“hope to do sth” 这种用法是只能表示希望自己做某事,还是也能表示希望别人做某事 浓硫酸催化酯化反应羟基联苯羧酸和乙醇的酯化反应,要求在浓硫酸催化下进行,希望各位大侠给出详细步骤包括是不是还要反应溶剂、加料顺序,加料用量,反应温度,反应容器,以及后处理提纯. 为什么酯化反应需要浓硫酸催化? 18K白金的主要成分(化学元素）要的是化学元素~ 铂金比其他铂系金属好在哪儿?为什么总是“相对”贵很多 自来水厂消毒二氧化氯发生器哪几个品牌质量最好 THE DAWNS HERE ARE QUIET怎么样 The things here are very c______ the children are very quiet与the children are being very quiet的区别 being起什么作用? 有人认为元素周期表位于第一主族的氢可以放在第七主族,能支持这种观点的是（）A.HF B.H3O+ C.NaH D.H2O...有人认为元素周期表位于第一主族的氢可以放在第七主族,能支持这种观点的是（）A.HF B 酸和醇的缩聚反应怎么反应的 醇羟基可以缩聚吗?酚羟基和醇羟基可以缩聚吗?中学化学中老师好像说醇羟基很难缩聚 至于酚羟基有酸性是不是可以理解成羧酸和醇羟基反应? He sat down beside Christina,feeling the warmth of the sun against his face,_____ to relax for the first time in days.A.able B.was able C.ought D.getting 请问逻辑主语与句子的主语一致为什么用独立主格结构,如The.old.man.sat.down,his.face.pale...请问逻辑主语与句子的主语一致为什么用独立主格结构,如The.old.man.sat.down,his.face.pale. He got to his office and sat down to b____ his work I live in the centre of Moacow.（改为否定句）I _ _ in the centre of Moscow. in the center of Moscow的中文 Short people often have better than tall people.的汉语意思 "People.often.said:There.is.no.short"People.often.said:There.is.no.short- cut.in.learning"帮我翻译一下谢啦! what do people in western countries do when they fall ill?They____their doctorAmake appoinments with Bgive a hard to Care strict with D save up for 苯酚能和无机含氧酸发生酯化吗