若方程：+1=有增根，则=；-八年级数学

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• 关于x的方程x+2x+3=mx+3产生增根，则m的值及增根x的值分别为（）A．m=-1，x=-3B．m=1，x=-3C．m=-1，x=3D．m=1，x=3-数学
• The new teacher was very slow to _____the unusual rules of the school. [ ]A. lead to B. adapt to C.
• 若方程2-xx-5=m5-x没有实数根，则m等于（）A．-2B．2C．5D．3-数学
• The beauty of this career is that it allows us to________our interest with our work, gaining freedom
• 已知方程x-1x=112的解为x1=2，x2=-12；方程x-1x=223的解为x1=3，x2=-13；方程x-1x=334的解为x1=4，x2=-14；…请观察上述方程及其解，再猜想出以下方程的解（
• Smoking is a bad habit．You should it．A．throwB．get away withC．get rid ofD．throw away-高一英语
• After studying in medical college for five years, Jane ______ her job as a doctor in the countryside
• His laziness ___________ his failing in the exam.A．result fromB．accounts forC．because ofD．is on acco
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• 现要装配30台机器,在装配好6台以后，采用了新的技术,每天的工作效率提高了一倍，结果共用了3天完成任务，问原来每天装配机器有多少台-八年级数学
• 74. --- Sally, would you ______ the story? --- But I told the second part of the story this morning!
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• — I've been working really hard at English recently, but it still remains poor.— Don't giv
• 方程1x-3+33-x=2的解是（）A．x=3B．x=-3C．x=2D．无解-数学
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• 解方程：（1）1-x2-x-3=1x-2；（2）x+1x-1-4x2-1=1．-数学
• 若1x-3-2=k3-x有增根，则增根是______，k=______．-数学
• 下列分式方程有解的是（）A．2x+1+3x-1=6x2-1B．x2+1x=0C．22x-1=0D．1x-1=1-数学
• 解方程：（1）63x=52x-1（2）1x-3+1x+3=10x2-9．-数学
• 解分式方程：3xx-5+155-x=1．-数学
• 若分式方程的解为负数，则的取值范围是（）.A．B．C．D．-八年级数学
• 某煤厂原计划x天生产120吨煤，由于采用新的技术，每天增加生产3吨，因此提前2天完成任务，列出方程为----------------------------------------------（）A．
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• It was almost midnight when a fire _____ in the neighborhood.A．blocked outB．turned out C．broke out D
• 若分式2x+1x-1与1-2xx-1的值相等，则x为（）A．1B．12C．-1D．0-数学
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• 分式方程1x-1=2x2-1的解是（）A．x=1B．x=-1C．x=3D．无解-数学
• The students in the class were______ four groups before they started the game.A divided into B separ
• 若关于x的方程2-xx-5-m5-x=0无解，则m的值是（）A．-2B．2C．5D．3-数学
• 解分式方程:-八年级数学
• 若解分式方程产生增根，则________；-八年级数学
• 方程的解是（）A．1B．2C．D．－2-八年级数学
• 给出下列说法：①分式方程28-x=0无解；②方程|x|x2+1=0无解；③方程x+1x+1=1x+1-1的解是x=-1；④x-2x2-4=0的解是x=2．其中，正确说法的个数为（）A．1B．2C．3D
• — Many people are in great need of extra food.— Yes. It is a challenge to________all their needs. [
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• Simon was _____ why many of his friends didn’t turn up at his birthday party. A．limitedB．crashed C．s
• When the applause ______, Obama continued his speech.A．died offB．died downC．died outD．died of-高二英语
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• Though he killed a boy, he was________to 20 years' imprisonment instead of death because of his
• 解方程：3x-2=2+x2-x．-数学
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• As the final exam is just around the corner,all the students are in reviewing the lessons carefully.
• You'd bettersome hot water into the kettle in case the tea cools down. [ ]A. addB. fill C. fill
• Try not to start every sentence with "the".the beginning of your sentences.[ ]A. VaryB. De
• Gases from cars are the air of our cities. [ ]A. protecting B. poisoning C. preventing D. providing-
• 解下列分式方程：（1）1x2-1+2x+1=0（2）x2x-5+55-2x=1-数学
• ．解方程：（5分）-八年级数学