若x、y都是实数，且y=则x+y=-八年级数学

更多内容推荐

• （1）（2）-八年级数学
• 若，则=-八年级数学
• -九年级数学
• Up to now, the family’s business ______good. I hope our good luck will continue.A．isB．wasC．will beD．
• We________ up by an alarm clock every morning.A．wakeB．are wakenC．were wakenD．woke-高二英语
• Nobody wants to___________ especially in public.A．make fun ofB．be made fun ofC．making fun ofD．made f
• —Every now and then I get hungry for Chinese food. Let’s dine out tonight.—Forget it. My money______
• —Hi, Susan, you look tired.—I ______ for months for the coming celebration for the school’s 60th ann
• 下列计算正确的是（）A．＋＝B．·＝C．＝3D．÷＝2-八年级数学
• I ______ along the road when I saw Peter. So we stopped and had a chat.A．walkedB．was walkingC．would
• 计算：（1）（2）-七年级数学
• —How was the journey?—Tiring! I caught the train at the last second but all the seats _____．I stood
• My father _____ away for two months．I want to do something special for him when he comes back next w
• 使式子有意义的x的取值范围是（）A．x＞1B．x≥C．x＜1D．x≥1-九年级数学
• 要使二次根式有意义，字母的取值范围必须满足的条件是（）A．B．C．D．-九年级数学
• —Nice to see you again after all these years. What _____?—Well, I’ve tried many things since we left
• When I talked with my grandma on the phone, she sounded weak, but by the time we ______ up , her voi
• The deadline has been ________ till next Monday.A．enlarged B．expandedC．extendedD．increased-高二英语
• 计算：22+8-50的结果为（）A．0B．2C．-2D．42-50-数学
• 计算：=-九年级数学
• 计算：（1）；（2）-九年级数学
• 计算：（）。-九年级数学
• 2bab+3aa3b-(4aba+9ab)．-数学
• +=0，则的值为A．B．C．D．-九年级数学
• Catherine didn’t like her roommates, because they _____ things from her.A．are always borrowingB．have
• Betty will ring me up as soon as she ______ in Beijing.A．arriveB．arrives C．arrivedD．will arrive-高一英语
• – I’m leaving for Beijing next week.– How long ______ there?A．have you stayed B．are you staying C．ha
• Recently, I ___ my first horse ride in Lijiang, Yunnan Province __ I paid a visit to many local attr
• --How did he get infected? --She ____the viruses without any protection.A．exposed toB．had exposed to
• 二次根式有意义时，x的取值范围是（）A．x≤B．x<C．x>D．x≥-九年级数学
• Henry works as a teacher now, but he ______ on a farm for three years.A．has worked B．had workedC．wo
• 计算的结果是（）。-八年级数学
• --I’m going to the States?--How long ________ you________ in the States?A．are; stayed B．are; staying
• 计算的结果是A．B．C．D．-八年级数学
• It is said that a new shopping street ________here next year.A．will build B．will be builtC．would bui
• 下列运算正确的是A．B．C．D．-八年级数学
• Seeing a stranger with a knife in his hand, the little girl stood under the tree, _______ out of her
• 已知．甲、乙两个同学在的条件下分别计算了和的值．甲说的值比大，乙说的值比大．请你判断他们谁的结论是正确的，并说明理由．-八年级数学
• My father used toon weekends,but now he is used toevery evening.A．go fishing; danceB．going fishing;d
• .In the near future, more advances in the robot technology _____by scientists.A．are makingB．are made
• I haven’t finished my homework yet. I my mother with the housework all day yesterday.A．helpedB．have
• It’s the second time that Iin Beijing. What great changes! It’s years since I here last time.A．went;
• 计算：(1);(2).-八年级数学
• 计算:_____________-八年级数学
• 计算（6分）：-八年级数学
• This is the first time that I ______ the song Gangnam Style.A．hearB．are hearingC．heardD．have heard-
• —We are informed that the Weifang International Kite Festival starts at 7:00.—Oh, I didn't exp
• The reason why I want to write this review is to warn future travelers on how to avoided ___________
• — Put these glasses away before they______. — OK, I’ll put them in the cupboard.A．have brokenB．are b
• ------What's the matter with Tim? ------Oh, Tim's cell phone was left in a taxi accidental