如果有一个数r，使得r2=a，那么r叫作a的一个______．-数学

更多内容推荐

• Miss Jones _______ music at Bardon School for five years when she was abroad and now she is an actre
• 16的平方根是（）A．2B．2C．±2D．±2-数学
• 如果一个数的平方根与这个数的立方根相等，那么这个数等于（）A．0B．1C．0或1D．-1-数学
• — Where have you been?— I in the heavy traffic. Otherwise I here earlier.[ ]A. got stuck; would have
• 正数a的平方根有（）个，用符号可表示为（），它们互为（），其中正的平方根叫做a的（），记作（）-九年级数学
• Only when I read this story for a second time to appreciate its beauty. [ ]A. did I beginB. that I b
• I would have come earlier, but I________that you were waiting for me.[ ]A. hadn't knownB. didn&
• Oh，it’s you，my dear friend.I________you at first sight.Where have you been these years? [ ]A．didn’t
• I insisted the file in his computer ______ urgent(紧要的), and it _________ to Mr. Brown without delay.
• All of the guests ________ by 9 o'clock, but the host ________ until 15 minutes later.[ ]A. arr
• Miss Alice ________Beijing last Friday, and ________ in a couple of days.[ ]A. went to; come backB.
• 已知2a-1的平方根是±3，3a+b-1的算术平方根是4，求a+2b的值．-数学
• 如果一个数的平方根等于它的算术平方根，则这个数是（）A．1B．-1C．±1D．0-数学
• 25的平方根是（）A．5B．±5C．-5D．±5-数学
• — Thomas didn't come to school for the meeting, did he?— No. He ____. The meeting had been canc
• The businessman __________ a lot of money to the hospital, which was helpful to the development of i
• 下列关于13的说法中，错误的是（）A．13的平方根是13B．13是13的算术平方根C．13是无理数D．3＜13＜4-数学
• 下列语句中正确的是（）A．36的算术平方根是6B．36的平方根是-6C．-36的平方根是6D．36的算术平方根是±6-数学
• Our town________poor in the past，but great changes________in the town in the past three years.[ ]A．w
• The teacher as well as 6 girls and 8 boys from her class ________visiting a museum when theearthquak
• Idon'tunderstandhowyougotaticket.Ialways______you______acarefuldriver. [ ]A.think;are B.amthink
• 下列说法中不正确的是（）A．-1的立方根是-1B．0的平方根与立方根相等C．-4的平方根是±2D．每个数都有一个立方根-数学
• —Your colleague's spoken English is quite good, Amy.— No wonder, as shein the USA for two years
• 求下列各式中x的值①8x2-2=0②2（x-1）2-72=0．-数学
• 求x值：①x2-24=25②4x2=25．-数学
• 如果a的平方根是±2，那么a=______．-数学
• 下列说法：①负数没有平方根；②任何一个数的平方根都有2个，它们互为相反数；③a无意义；④9的平方根是3；其中错误的有（）A．1个B．2个C．3个D．4个-数学
• —If the traffic hadn't been so heavy, I could have been back by 6 o'clock.—What a pity! Ti
• 一个数若有两个不同的平方根，则这两个平方根的和为[]A．大于0B．等于0C．小于0D．不能确定-八年级数学
• They were determined to carry out the plan at first, but then we ________ persuade them to change th
• Yesterday a school boy is daydreaming in class. Not knowing that he was doing, he put a pen cap int
• 若1-m与3m+1是同一个数的平方根，则这个数可能是______．-数学
• 平方得16的有理数是（）A．4B．-4C．4或-4D．不能确定-数学
• The mother together with her three children________seen begging in the street yesterday. [ ]A. areB.
• 已知一个实数的平方根是a+3和3-2a，则这个实数为______．-数学
• 4的平方根是（）A．8B．2C．±2D．±2-数学
• Yesterday I________from the Internet that the environmental organization was________on March 15,1986
• 若正数a的两个平方根的积为-925，则a=______．-数学
• 若5x+4的平方根是±1，则x=______．-数学
• 下列说法错误的是（）A．1的平方根是1B．-1的立方根是-1C．-1是1的平方根D．-3是（-3）2的平方根-数学
• 已知二次根式的值为3，那么x的值是[]A．3B．9C．-3D．3或-3-八年级数学
• 短文改错。下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。增加：在缺词处加一个漏字符号（∧）， 并在其下面写上该加的词。删除：把多余的词用斜线（\）划-高二英语
• 81的平方根是（）A．-9B．9C．±9D．±3-数学
• 如果一个数的平方根是2a-3和a+9，则这个数是______．-数学
• A few minutes earlier, and you would have seen the NBA star. But you ________. [ ]A. didn't com
• — Amazingly, Zhuo Jun got the first place for the China's Got Talent (中国达人秀) last night.— So wo
• 一个数如果有两个平方根，那么这两个平方根之和是（）A．大于0B．等于0C．小于0D．大于或等于0-数学
• I have been working with Lily for years, and never beforeher so serious![ ]A. I found B. I have foun
• —Hi,Michelle, I can't find my e-dictionary.—Sorry,Iit. I guess I put it on the top shelf with m
• He insisted that he ____right, and so he insisted that his plan ____carried out at once.[ ]A.was; be