中海桃花源二期地图

本人只有五分,全给!某元素R单质有3种双原子分子,其相对分子质量分别为70,72,74,这3种分子在自然界的物质的量之比为9：6：1,则R元素有多少种核素?其单质的平均相对分子质量为多少? 在标准状况下,1体积水里溶解了500体积的氨气,所得氨水的密度0.9g/cm3,求氨水的摩尔密度（保留一位小数） 第三问和第五问? 化学大题一道.22.（8分）一定温度下,碳与水蒸气在容积不变的密闭容器中发生反应并建立化学平衡：C(s)+H2O(g) CO(g)+H2(g)；△H＞0⑴平衡混合气体的平均相对分子质量M1的取值范围为 ＜M1＜ ⑵将 1.改错You would do a much better work than we would.(我把"a"删去了,不知对否)2.改为感叹句：It's snowing very heavily.（）（）it is snowing!3.改为感叹句：It is great fun to have a pinic on the hillside.() () it is to have a p 英语题 5（最好讲解一下） 求助五道外语题望得到解释11 I _______at the thought of having to make a speech in the presence of all my teachers.a shook b fainted c trembled d declined key c 12 No bread eaten by man is so sweet as __________earned by his own labor.a whi The general’s command was that the soldiers _________ their fort and carry out more important tasks.A.would leave B.leaveC.left D.have leftWritten applications should be sent to us in case _________some problems with the electric version.A.there wi 1.I lost my way in complete darkness and,___ matters worse,it began to rain.A.made B.making C.to make D.having made2.--Can I help you?---I'd like to buy a present for my father's birthday.____ at a proper price but of great use.A.one B.the one C.whic 三道英语题、要解析的1.The doctor did what he could （ ） the dying man. A.saveB.to saveC.saved D.saving2.It's too hot. Put the fish in the fridge ,or it will( ) bad.A.goB.changeC.feelD.keep3.-Will you piease ( ) it to me on Firday? 帮忙做三道英语题（带讲解的）1.My deskmate ,Lily, has been admitted to shan dong university ,learning French, _______ , of course, made the others envy her.A.which B.as2.John got beaten in the game, ______ had been excepted.A.as 英语题III ,请讲解一下 1.-----You look a bit painful.Can I give you a hand -----______,that hurts!A.Get me off B.Don't trouble meC.You needn't do that 2.Grandmother and Penny,the dog,quickly became very attach to each other,but that the attachment grew much____about three 英语题 需解释The construction of the laboratory _ by the end of next monthA must be completed B.musthave been completed C.will be completed D.will have been completing其他的怎么排除的答案是aD怎么错了？？？ 求4,5题答案 4.5.. 第5题过程 第5题的过程 第5题, 谁会第5题的过程呀, 4、5题. 出5道类似的题目, 第五题! 第五题!要写过程!详细! 第5题并且要过程 5题怎么做,要过程 第5题怎样做 请问第5题该怎样做? 第5题应该怎样做? 做第5题. 第5题点样做? 第五题怎做?