解方程组：-九年级数学

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• 设(2x+1)3=a0x3+a1x2+a2x+a3，这是关于x的一个恒等式（即对于任意x都成立）。则a1+a3的值是（）。-九年级数学
• 要使等式12=1x+1y成立的自然数（x，y）是______．-数学
• _______we are worried about is that air pollution is becoming much heavier in Han Dan.A．ItB．WhatC．Wh
• The limits of a person’s intelligence, generally speaking ,are fixed at birth, but he reaches these
• It was never clear _______ the man hadn’t reported the accident sooner.A．thatB．howC．whenD．why-高三英语
• _______ is known to us all is that the theme of Shanghai World Expo is “Better City, Better Life”.A．
• 二元方程1x+1y=15的正整数解的个数是（）A．1个B．2个C．3个D．4个-数学
• 方程2x2-xy-3x+y+2006=0的正整数解（x，y）共有______对．-数学
• __________knowledge comes from practice is known to all.A．IfB．WhatC．WhereD．That-高一英语
• _____ the city’s public school system should be open to the children of migrant workers has become t
• It gives his life a flying start ________ he has gone abroad for further education.A．what B．whenC．th
• ________ we go there by train or by ship makes no difference. The time and the fees are the same.A．
• 用140cm的铁丝围成一个面积为1000cm2的矩形，求这个矩形的长和宽。-九年级数学
• 关于x，y的方程x2+xy+2y2=29的整数解（x，y）的组数为（）A．2组B．3组C．4组D．无穷多组-数学
• ________ the famous actress wants to offer to her fans is honesty and happiness.A．WhichB．WhatC．ThatD
• ________wins the contest will get the chance to travel around Europe for a week.A．SomeoneB．AnyoneC．W
• 方程x2+2xy+3y2=34的整数解（x，y）的组数为（）A．3B．4C．5D．6-数学
• I want to show you is my gratitude and respect for your continuous and selfless help.A．ThatB．WhichC．
• ______ in the regulations is that you _____ other people the password of your e-mail account. A．What
• It remains unknown ________ the peace talk between the two countries is going to lead.A．where B．when
• —What's your uncle's opinion about your decision?—He always encourages me to do ________ I
• 方程xy-10（x+y）=1的整数解为______．-数学
• 2006年，市兴业建筑开发公司出资80万元购得一块黄金土地，计划再投资一定数量建筑资金，利用这块土地修建商品房住宅楼计4000m2，根据预算，建筑资金由建筑材料费用支出，建筑-数学
• The limits of a person’s intelligence, generally speaking, are fixed at birth, but ________he reache
• _______parentssayanddousuallyhasalife-longeffectontheirchildren.A．ThatB．WhichC．WhatD．As-高三英语
• (2013·高考陕西卷)It remains to be seen________the newly formed committee’s policy can be put into practic
• (2013·高考江西卷)________one of you breaks the window will have to pay for it.A．WhoeverB．WhateverC．Whiche
• 设直角三角形的两条直角边长分别为a，b，斜边长为c．若a，b，c均为整数，且c=13ab-（a+b），求满足条件的直角三角形的个数．-数学
• ___ in the regulations is that you ___ other people the password of your e-mail account．A．What is re
• The organizers promised ______ won the first prize would have a chance to go abroad.A．whoB．whomC．who
• It was never clear ________ the man hadn't reported the accident sooner.(2011·江苏)A．thatB．howC．w
• 方程x2-y2=1995的正整数解共有______组．-数学
• ______ leaves the room last ought to make sure that the windows are closed and the door locked.A．Who
• ______ is a fact that English is being accepted as an international language.A．ItB．ThisC．ThatD．There
• (2013·高考四川卷)________you said at the meeting describes a bright future for the company.A．WhenB．HowC．W
• is surprising to us is that Tom can speak English fluently as though he were a native speakdr.A．What
• Life is like a tale. ________ matters is not how long it is, but how good it is.A．WhichB．ThatC．WhatD
• The price of pork has not been kept under control as expected, and _____ is more surprising is that
• 方程|xyz|=4的整数解的组数是（）A．64B．48C．8D．6-数学
• Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent c
• _______ will win is still a questionA．WhoeverB．WhoC．WhomeverD．Whom-高二英语
• 初三（8）班尚剩班费m（m为小于400的整数）元，拟为每位同学买1本相册．某批发兼零售文具店规定：购相册50本起可按批发价出售，少于50本则按零售价出售，批发价比零售价每本便宜2元-数学
• (2013·高考重庆卷)______ __struck me most in the movie was the father’s deep love for his son.A．ThatB．ItC．
• (2013·高考天津卷)________ I want to tell you is the deep love and respect I have for my parents.A．ThatB．W
• (2013·高考北京卷)________makes the book so extraordinary is the creative imagination of the writer.A．That
• It is obvious ________ the former Libyan government will be replaced with the opposition government.
• ­­­She told me that ______ was needed at that time was some good luck.A．itB．whatC．thisD．
• ______ was most important to her, she told me, was her family.A．This B．WhatC．AsD．It-高三英语
• _______ excited her parents most was that he was admitted to his dream college.A．ThatB．WhatC．WhichD．
• _______ breaks the law should be punished .A．Those whoB．WhomeverC．No mattter whoD．Whoever-高二英语