81的算术平方根为A．±3B．3C．±9D．9-八年级数学

更多内容推荐

• —Have you persuaded him?—Yes. After some hours of discussion, I ________ to reason him in accepting
• Some research workers completely all those facts as though they never existed.A．refuseB．missC．leaveD
• 计算：。-九年级数学
• 计算小题1:小题2:-九年级数学
• My brother _____ the Youth League since 1990. A．joined B．has been in C．has joined D．had joined-英语
• —Look! Somebodythe sofa.—Well, it wasn’t me. I didn’t do it.A．is cleaningB．has cleanedC．was cleaning
• -九年级数学
• 当X时，-九年级数学
• A relative of yours ______ this evening.A．will be coming to see you B．will have been comingC．would c
• 30. After he had recovered from his injury, he caught a squirrel (松鼠) and raised it as a pet. Soon h
• 计算（1）12-27-20+50；（2）(5-6)(3+2)．-数学
• 小题1:4的算数平方根是________小题2:=________.-八年级数学
• 若最简二次根式和是同类二次根式，则a，b的值为（）a=0,b=2B．a=2,b=0C．a=－1,b=1D．a=1,b=－2-九年级数学
• 当时，二次根式有意义．-九年级数学
• My pain _____ obvious the moment I entered the office，for the first man I met asked pitifully，“Are y
• 化简=_________-九年级数学
• The mother many things to get her daughter a good education.A．purchaseB．produceC．sacrifice D．store-高
• The first time I ________ here, it was the year of 1980; this is the third time that I _________ to
• —Did you ask your elder brother for help?—I need to. I managed it by myself.A．don't B．wouldn�
• Great changes _______ in his hometown in the last twenty years. A．have taken placeB．were taken place
• 将1、、、按右侧方式排列．若规定（m，n）表示第m排从左向右第n个数，则（5，4）与（15，7）表示的两数之积是．-九年级数学
• -八年级数学
• —Did Alan enjoy seeing his old friends yesterday?—Yes, he did. He his old friends for a long time.A
• Thanks to the policy, birth rates in the country_____ 2 percent annually for the past five years.A．h
• 计算：（1）；（2）。-八年级数学
• 当X时，-九年级数学
• How I wish I a doctor and I the girl.A．am; can save; deadB．was; can save; deathC．were; could save;
• —I thought I asked you to fix the radio.—Oh，I’m sorry.Mother，I__________it right now.A．am to doB．w
• The book ____ forty maps, three of Great Britain ____.A．is containing; includesB．contains; includedC
• 在函数中，自变量的取值范围是（）A．且B．且C．D．-九年级数学
• 化简的结果是（）A．B．C．D．-九年级数学
• When I was in the countryside, I ____ by the riverside every day.A．walkedB．was walkingC．walkD．have w
• — Isn’t it hard to drive downtown to work? —Yeah, that’s why I ______ to work by train. A．have goneB
• I called Mary many times yesterday evening, but I couldn’t get through. Her brother _________ on the
• When I met Becky, she told me that she ______ for an interview the next day.A．would goB．has goneC．w
• I wasn’t aware of this before, but recent research _____ that eating too much fat can contribute to
• To everyone’s amazement now, technology ________ faster than most people can keep pace with.A．is cha
• 计算：（1）（2）：-八年级数学
• 友情提示：请同学们做完上面考题后，再认真检查一遍，估计一下你的得分情况，如果你全卷得分低于60分（及格线），则本题的得分将计入全卷得分，但计入后全卷总分最多不超过60分-八年级数学
• 小题1:2＋－4小题2:．-九年级数学
• 若则．-九年级数学
• 如果把棱长分别为3.51cm,2.26cm的两个正方体铁块熔化，制成一个大的正方体铁块，那么这个大正方体铁块的棱长是多少？（用一个式子表示，并用计算器进行计算，最后结果保留2个-八年级数学
• -八年级数学
• Unfortunately my ear broke down and I was stuck here while it________ .A．was being repairedB．was rep
• —Where is Mr Smith?—Hein prison for more than two months.A．has beenB．has been sentC．has been thrownD
• The book has been translated into thirty laguages since it ____ on the market in 1973. A．has come B．
• —Would you like to go to the cinema with me tomorrow afternoon?—I’d like to, Mum, but I ________ to
• 计算(每小题6分,共18分)小题1:(1)小题2:(2)小题3:(3)-八年级数学
• 已知，那么的值为（）．A．－1B．1C．D．-九年级数学
• 计算：。-八年级数学