亚硫酸氢钠沸点

— This time I really want to quit smoking.— _____________B_________________________.A.It takes you a lot of trouble to do that.B.It’ll be really hard for you,I suppose.C.That’s very kind of you.D.Don’t tell others.请高手讲下为什么 已知椭圆的焦点是F1（-1,0）,F2（1,0）,P为椭圆上一点,且绝对值F1F2是绝对值PF1和绝对值PF2的等差中项1）求椭圆的方程2）若点P在第三象限,且角PF1F2=120°,求tan角F1PF2 1.已知椭圆C:x^2/a^2+y^2/b^2=1(a>b>0)的右准线与x轴交于点A,点B的坐标为(0,a).若椭圆上的点M满足AB=2AM,则椭圆C的离心率为?2.点M是椭圆C:x^2/a^2+y^2/b^2=1(a>b>0)上的点,以M为圆心与x轴相切于椭圆的焦点F,圆 问：这个红色的式子表示什么?问2：那个x1+x2=1 这个式子为什么是红色式子的解的和?第一问问错了：应该是椭圆的方程和直线的方程要是联立表示的是什么啊？ 泓妤怎么念?查字典都是第2声,这样念就变成红鱼了,很难听.可人家说的时候是前面第2声,后面第3声.到底怎么念? 妤 这字念什么? 左罗的面具主题曲I Want To Spend My Lifetime Loving You的歌词 the bad news ___that my english teacher said ___I wasn't good at speaking.A.was whichB.are that C.is thatD.were that lilei said that is right.这句英文错在哪里?那如果加双引号了呢,lilei said ：“that is right.” 姝言是什么意思 姝女是什么意思 静姝什么意思 彼姝者子,何以告之. 以protect our eyes为题 关于保护我们眼睛的初二英语作文 求英语作文how to protect our eyes "_____ and then you can pass the exam." my teacher said."_____ and then you can pass the exam." my teacher said.A.Working hard B.Work hard C.Worked hard我知道这题答案是B,但是我想请问一下,为什么? I want to go back No matter I never give may i give this book back to you的意思 Don't be afraid speak ____,please!The teacher said ____.Don't be afraid speak ____,please!The teacher said ____.A.loud;loud B.louder;loudly C.loudlier;loud D.loudly;loudly 这个字怎么读“姝”? “姝”怎么读?它是一个什么字? 姝字用用英文怎么读?我指的不是拼音读法,比如；金,英文写下来就是KIM “姝”字的拼音 ---▁▁is it today?----It's April Fool's Day A.what B.howC. what day D.what date回答的详细点,谢谢 姝字什么含义? loving to love Addiction to love you中文翻译 ＜陋室铭＞中龙,仙比喻什么? 《Living to love you》歌词同题目 歌手是Sarah Connor 谢谢～ living to love you歌词的翻译 英语翻译求正解,求翻译, look的不及物动词词组有哪些如题````