已知X补Y补则(x-y)补

like some of my classmates,i cannot live up to my teachers' expectations 写一篇“travelling to hainan island”为题写一篇英语作文假如你是李华,今年的国庆期间你去海南岛旅...写一篇“travelling to hainan island”为题写一篇英语作文假如你是李华,今年的国庆期间你去海 在一个密闭容器内有X,Y,Z,Q四种物质,在一定条件下充分反应,测得反应前后各物质的质量如下表所示.物质 X Z Y Q反应前质量/g 4 10 1 25反应后质量/g 未测 21 10 91.表中X反应后的质量为多少? It must be him,_________?反意疑问句是啥 there must be 反意疑问句什么时候用aren't there 什么时候用isn't?有什么区别?例如：There must be some people shouting.的反意疑问句应该怎么变?为什么 磷酸铵镁肾结石怎么治疗? 磷酸铵镁的化学式 有ABCD元素,原子序数递减,A元素的1mol原子最外层的电子转移给D元素的1mol原子,B元素的1mol原子最外层的电子转移给C元素的1mol原子后,都变成电子层结构与氖原子相同的离子,ABCD的元素符号分别 Take That的《Reach Out》中文歌词. I was born on first of the May的同义句_____ ______ _______ on the first of May I was born on the first of May?同义句 I was born on__ the first()()y这句话的意思 磷酸铵镁失水请问磷酸铵镁在氨气流中加热到100度会失去5分子结晶水,在空气中加热到100度会失去全部结晶水成无水磷酸铵镁,这是为什么,能具体说说吗 first of all 与at first实质区别别只给解释说下用法,是语法用法 after all 与at all与at first与first of all区别 the easiest way to touch someone's heart to reach out and hold their hand.帮我翻译一下。 I would like so much to reach out and touch you in loneliness 翻译成中文什意思 Every time?just when I can reach out and almost touch you .you disappear这句是什么意思呢? reach 和 touch 区别是什么?我在儿子的书上看到,I can reach my toes and touch the ground with my hands.I can touch the leaves.这二词有什么区别吗? Reach out your hands and help others and you welcome to our wedding 的意思是什么? Welcome to our Welcome To our show是什么意思 Welcome To our 无标准答案的 [L1,L2（部分)]L11.Choose the correct word:b Boeing 747’s (is – are – were) manufactured in Seattle.e Your final test (is – was – will be) corrected by your teacher.f Faults (is – are – were) prevented by good maint 初三英语试题 我要标准答案43.What happened ________ him?His leg has broken.A.to B.with C.of44.Hurry up,he ________ for us at the station.A.must wait B.must be waiting C.should wait45.Ride slowly,please.There is ________ traffic at the time 2010湖南英语三级标准答案及试题急求 take out 和 put out的区别?reach 和 catch的区别?The wind blew his hat into the river.He (took) put out his hand and tried to (catch) reach it but he could not so he jumped into the river and got it.句子中打括号的词为什么不用?take take that的Patience歌词要是有中文翻译就更好了, 谁能帮我翻译一下Take That的Patience的歌词啊~Patience Take That Just have a little patience I'm still hurting from a love I lost, I'm feeling your frustration. Any minute all the pain will stop. Just hold me close inside your arms tonight 如何判断烯烃上碳原子在同一平面上 请问:由联轴器连接的水泵和电机,电机的实际效率怎样计算