0.1摩尔每升的盐酸

sinx=-1/4,π I was disappointed to hear the news中的to hear the news在句中做什么成分? 请问解反正弦函数的题目要领是什么啊?如何做这类题,怎么样思考?例如：求函数y=π/2 + arcsinx ,x属于【-1,+1】的反函数.再例如：求函数y=sinx + 1 ,x属于【π/2 ,3π/2 】的反函数 He was amazed to hear the news.He was ____ ____ the news.变同义句 Tom was very()to hear the newsexciteingexciteto exciteexcited I was sorry to hear the news.中文意思,另外不定式to 的应用, L was relly ________ to hear the good news One tree is tall One tree is short They are between the house they are helping the housethey are helping_____(填什么） the house They are cleaning the house. I ______ (see) the film before I_______ (not go)to the cinema this evening. The book is for ______because it’s easy to understand.用begin的适当形式填空 I ___ (not see ) the film this evening because I ___( see) it I won't go to see the film this evening because I_____the ticket I would rather they did not hear the news.这句话是虚拟用法 为什么要用过去式...I would rather they did not hear the news.这句话是虚拟用法 为什么要用过去式而不是过去完成时 It always seems as if they would get married.yes,but we did not hear of any news.这个句子正确吗? 【连词成句】change,haircut,time,to,your,is,it,is,style,it,of,because,out. 怎样求正弦函数的值域?能不能举例说明? 正弦函数值域问题例如,sin（0.5x+0.25兀）在0到2兀的值域 正弦函数的值域是什么, 关於正弦函数的值域已知f(x)=2sin(x+π/6),当x∈[π/12,π/2],求f(x)的值域. 正弦函数值域一定是[-1,值域到底是指什么? I'm( )(happy)to hear the good newsMany people( )(like,love)skating in cold winter. Does your friend want lotuses or not 如何回答 I am truly happy to hear the news.这里为什么添tryly而不是true? I'm so ______ to hear the good news A happy B happiness C sad D sadness I am happy to hear the news 的意思今天的快谢谢 请问这是什么花,应该怎么培养? 怎样判断两圆的位置关系 两圆 x^2+y^2-2x=0与 x^2+y^2-4x=0 的位置关系.知道半径和圆心怎么知道他是内切？ （数学）求两圆位置关系已知两圆的方程为x^2+y^2+4x-5=0和x^2+y^2-12x-12y+23=0,那么这两圆的位置关系是_______________A.相交B.外切C.内切D.相离 一个最简分数,分孑、分母的和是40,分孑、分母都加上3,约分后是13分之10,求这个最简分数.