四年级下册科学暑假作业本答案

They enjoy themselves at the birthday party请翻译这句话 自来水黄如何消毒 高锰酸钾长期用于瓷砖消毒池中,消毒池变黄.如何除去黄色?消毒池表面变黄 用什么试剂能除去黄色 最近养龟买了个整理箱''想用高锰酸钾消毒''但泡了半天后出现黄色物质''请问大虾们用不用去除? Have you decided the time______ you will spend on holidays为什么用that 不用when the president will see you on Sunday,___ he will have more time to spend with youA.which B.where C.when D.if I have decided to spend my holiday in the countryside.___I'm sure you'll have a good time there.A Sounds wonderful B Of course C Let me see D Well done You will be happiest if you have friends in the places where you spend the most time.怎么翻译急 They enjoy themselves d____the party They enjoy themselves____the birthday party填空请翻译这句话 we have decided to hold a football match next week .will you ___?为什么不可以填take a part in?答案是play a part,是因为介词in吗?那要怎么判断啊?纠结死我了, We will have a football match next week有什么错 We () have a football match next week. we ___(have)a football match next week,aren't we 怎么种牵牛花? 牵牛花怎么种 如何种牵牛花 牵牛花是怎么种的 打电话时,这句话用英文怎么说?您好.很冒昧给您打电话,我有点急事需要找**,能否转告她：请立即给家里打个电话. 45个小朋友从前往后数,小刚是第20个,从后往前小莉是第10个,小刚和小莉中间有多少个人,问算式 英文打电话的几个句子我是XXX从中国打的电话,请问是XXX么 我打扰到你了么我希望可以与你们一同度过美好的一年因为时差,打电话可能不太方便,你有邮箱么或是MSN不是直译,表达出来就好 外贸中打电话常用的英语句子有哪些? He hardly enjoyed himself at the party last night.(改为反意疑问句）He hardly enjoyed himself at the party last night,____ ______? 已知：如图,在△ABC中,∠ACB=90°,AC=BC,直线MN经过点C,且AD⊥MN于D,BE⊥MN于E求证：①△ADC≌△CEB②DE=AD-BE Youi,library,must,talk,at,quietly,the怎样连词成句 ________(not talk)!We must ________(is) quiet in the library. talk do not loudly the in library连词成句 改成否定句：1.Please speak fast.2.You must say it in English.3.You must talk in the library.4.Come early tomorrow.5.I can see someone under the tree. 为了使用石灰浆（Ca(OH)2）抹的墙壁快点干燥,常在室内生个炭火盆为了使用石灰浆（Ca(OH)2）抹的墙壁快点干燥,为什么常在室内生个炭火盆?为什么开始放炭火盆时,墙壁反而变潮湿? 为了使用石灰浆【Ca（OH）2】抹得墙壁快点干燥,为什么常在室内生个炭火盆?为什么开始放炭火盆时,墙变潮急用,快呀. 用石灰浆刷墙后,为了使墙壁快点干燥在屋内放上炭火,为什么墙壁反而湿了?题目要求用两个化学方程式解释为什么开始放炭火是墙壁反而湿了?是两个化学方程式 我只知道一个 how can he （）the new school?其中A gets to、 B get to、C arrive、D arrive to每个选项都不是很明白请求帮助一一解释!