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跪求高二化学、芳香烃,烷烯炔烃知识要点大神们帮帮忙 英语单选题.十道 猎人带猎狗追野兔,野兔先跑出80步,猎狗跑2步的时间等于野兔跑3步的时间,猎狗跑4步的距离等于野兔跑7步的距离,问猎狗需要多少步可以追上野兔? 十道单选题不难的一、单选题 1、It happened to be very cold ________ the morning of our sports meet.A.at B.of C.on 2、The table is ________ for two people.A.not big enough B.big not enough C.big enough not 3、How long ________?A.has the 小学数学环形追击问题中相遇时他们的路程差是环形路的周长? 分解因式：a^4+14a^3+49a^2的答案 把下列各式分解因式（过程） 1.a³-81a 2.-2x²y-x³-xy² 3.14a²b-49a³b-ab把下列各式分解因式（过程）1.a³-81a 2.-2x²y-x³-xy² 3.14a²b-49a³b-ab 4.a²-b²+（a-b） 5. 一道英语单选题1．The population of the village near sea,（ ）are making their efforts to develop economy of their own.A nearly seventy percent of which depend on fishingB． of which nearly seventy percent depends on fishing C.nearly sevent 英语单选题一道Sorry to have interrupted you.Please go on.Then where was You you didn't adapt to the way that the people lived there .A.had said B.saidC.were sayingD.had been saying 一道英语单选题求高手The newly-built café,walls painted light green,is really a peaceful place for us,especially after hard work.A.that B.its C.whose D.which这道题是考什么知识点?选什么?其余选项不选的原因是什么? 求助一道英语单选题——Can we put off the party till Sunday?——_____ .The place is booked in advance ,and no other days are available.A.Not reallyB.No wonderC.Don't mention itD.Never mind为什么不选D? 有一道英语单选题We will have the final examinations next week,so our teachers are busy ____the exams.A.preparing forB.preparing为什么答案选B 不选A 呢?preparing 也是为考试准备呀 什么是氧化反应 氧化剂 顺便说下 还原反应,还原剂!他们化合价怎么变 化学实验中化合价升高的是氧化剂还是还原剂?生成物被氧化还是被还原?还原剂;被氧化. 同一还原剂与不同氧化剂反应,怎样通过氧化产物的化合价高低判断氧化剂的氧化性强弱: 在25摄氏度下,将a摩尔每升的氨水与0.01摩尔每升的盐酸等体积混合,反应平衡时溶液中氨根离子浓度与氯离子浓度相等,用含a的代数式表示氨水的电离常数为——5* 10^(-5) / (a-0.01) CO+H2O=CO2+H2 现在CO被H2O反应掉百分之75 ,则C的氧化物中m（C):M(O) 为 我算出来3：14 可是不对 几道英文单选题,1.Twelve inches_____one foot.A.make B.makes C.is making D.will make2.”The possibility of the flood was just reported over the radio.”“I know.I heard abut it.The river_____the topof its bank.”A.got B.get C.gets D.has got3 求几道英语单选题答案39-45单选题39.-- How do you like your major?-- ____________________________.a、Do not like it very much.b、 I would like to have one.c、It looks like a good job.d、It is very nice of you.40 - Wanna talk with me?-- 解答几道英语单选题1.The man went into the room.____ rather strange.A.to look B.looking C.looked D.and looking为什么选B?不选D?2.Don't think of the exam,_____,it has passed quite a few days.A.In all B.Not ar all C.After all D.At all为 三角形ABC,角A、B都是锐角,且tanA-根号3的绝对值+（2SinB-根号3）平方=0,则三角形ABC是.A、等腰三角形 B、RT三角形 C、等边三角形 D、等腰RT三角形 求一道英语单选题答案Linda is feeling much better,but i think she______.A.remained well B.is still well C.remains weak D.remained weak 求一道英语单选题的答案Away ____ after classes yesterday,so I don’t know who broke the glass.A.did I goB.I goC.do I goD.I went为什么? 求一个英语单选题的答案!i saw my teacher ( ) a letter this time yesterday.A.writesB.writingC.is writingD.to write 一道英语单选题求解答Without any lyrics,they just made sign language(哑语) _____ the music.A.to B.from C.across D.through我觉得选AD都可以,不知道倒底正确答案是哪个, 写出下列化学方程式的氧化剂,还原剂,氧化产物,还原产物,电子转移的方向,并配平1.AgNO3+H2O==(电解）Ag+O2+HNO32.NaCL+H2O==NaOH+H2+CL23.Cu+HNO3==Cu(NO3)2+NO+H2O4.C+HNO3==NO2+CO2+H2O5.SO2+O2==SO36.CL2+Ca(OH)2==CaCL+Ca(CLO) 投资为什么对国民收入有乘数效应 什么是乘数?乘数在经济中发挥作用的前提条件是什么? 是一道宏观经济学的简答题:乘数原理发生作用应具备哪些条件?在线等,有加分 如果边际消费倾向等于1,投资乘数为无穷大,因而对国民收入的作用也无穷大, 当国民收入在乘数和加速数的作用下趋于下降时,其减少将受到下列哪些因素而放慢A.失业增加 B.边际消费倾向下降 C.加速系数上升 D.总投资降为零求答案及详解,谢谢! 一个礼品盒的打结部分的彩带长50cm,这个礼品盒的彩带共有多长?礼品盒长10CM宽6CM高8CM.