化简：（1）a(1+1a)-a2-2a+1a-1；（2）12x-1x+y×(x+y2x-x-y)．-数学

更多内容推荐

• ______the photos of the coastal city, I have no desire to visit it,it’s crowded all year.A．To seeB．T
• 化简：(1-a2+8a2+4a+4)÷4a-4a2+2a．-数学
• The decision _____, the next problem was how to make a good plan.A．madeB．being madeC．to be madeD．hav
• It was very cold, so we __ the fire__ all the time/A．have.. burntB．had… burnedC．had… burningD．have…
• 计算：mm+3-69-m2÷2m-3=______．-数学
• Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food
• Learn from every mistake because every experience， encounter， and particularly your mistakes are the
• ________ in a long queue, we waited for the store to open to buy a New iPad .A．Standing B．To stand C
• 先化简代数式：，然后选择一个使原式有意义的a、b值代入求值．-八年级数学
• 一个容器装有1升水，按照如下要求把水倒出：第1次倒出12升水，第2次倒出水量是12升的13，第3次倒出水量是13升的14，第4次倒出水量是14升的15…第n次倒出水量是1n升的1n+1…按照-数学
• He told us that the desk wanted ______.A．repairB．to repairC．repairingD．repaired-高二英语
• To save money,____________.A．every means must be triedB．it’s important not to buy expensive thingsC．
• I hate coming home every evening and a pile of junk mail in my post box.A．foundB．are findingC．findD．
• Mark lives in a big pleasant room ______ approximately 5 meters by 6 meters.A．measuresB．measuringC．
• — Is Alice still performing？ — I’m afraid not. She is said the stage already as she has gone abroad
• （1-11-x）÷xx-1．-数学
• 请你先化简，再选取一个使分式有意义而你又喜欢的数代入求值1a-(a-11-a)2÷a2-a+1a2-2a+1．-数学
• ______ up from the book, I saw his eyes _______ on me in curiosity.A．To look；fixingB．Looking；fixedC
• 计算：(a-x2a)÷(x-a2x)=______．-数学
• 已知a≠0，b≠0，1a+1b+2(a+b)a2+b2=0，那么ab的值是______．-数学
• you turn off all the lights when you leave the classroom．A．Making sureB．To make sureC．Being sureD．M
• 当a=-12，b=2时，求a-ba+b÷a2+b2a2-b2-a+bab•a2b+ab2a2+b2的值．-数学
• Mark has come in his raincoat and boots, _____ for rain.A．preparingB．preparedC．to prepareD．prepares-
• ____ with a difficult situation, Mr Smith made up his mind ____ his boss for advice.A．Facing; to ask
• I remember sometimes in a rush to grow up and be independent， but I was still very happy.A．to feel
• I wondered what great difficulty he had ________ the plan.A．to carry outB．carrying outC．carried out
• ---- What terrible weather! I simply can’t get the car __________.---- Why not try ________ the engi
• 化简：(x+xx2-1)÷(2+1x-1-1x+1)．-数学
• _____ into English, the sentence was found to have an entirely different word order.A．TranslatingB．T
• 化简（x-2x-1x）÷（1-1x）的结果是（）A．1xB．x-1C．x-1xD．xx-1-数学
• ____ such a chance, why don't you have a try ?A．To giveB．GivenC．Having givenD．Giving-高三英语
• 先化简，再求值：，其中x满足x2-x-1=0。-九年级数学
• You can use a large plastic bottle,cut off, as a pot to grow flowers in.A．the top isB．with its topC．
• ___ with the increasing unemployment, many people went on strike in most of the European countries.A
• 计算：（1x-1+1x+1）÷2x1-x．-数学
• Our school forbid __________, that is to say, we are not allowed __________at school.A．to smoke; to
• The vocabulary and grammatical differences between British and American English are so slight and fe
• --What do you think of cloning?--No doubt it’s a great invention. But ________, it may have some sid
• —— Have you considered _____ your job as a teacher?——Yes. I like the job because a teacher is often
• Microblogs experienced rapid growth in 2011 in China, with the number of microblog Operators, users
• 计算：（1）m2-3m9-m2（2）1-1x+1．-数学
• 先化简，再求值：其中x=1--八年级数学
• The glass of water is too hot. I prefer some cold _____ water. A．to boilB．having boiled C．boiledD．b
• The flood last month in the east was a real disaster, ___ 19 people dead and 78 missing.A．to leaveB．
• It’s reported that energy drinks are not allowed ___ in Australia.A．to be makingB．to be madeC．to mak
• “You can’t catch me!” Janet shouted, ____ away.A．runB．runningC．to runD．ran-高二英语
• how to work out the difficult physics problem ,he asked the teacher for help .A．Not to knowB．Not kno
• 已知3+y2-x=4，用含x的代数式来表示y，那么y=______．-数学
• When ____ where he was born, Kale said he was a Londoner.A．askingB．askedC．being askedD．was asked-高二英
• .．When I came into the classroom , I found him _______ with his study.A．occupiedB．occupyingC．to be o