If x，y and z are positive

cb_shi2022-10-04 11:39:541条回答

Ifx，y and z are positive numbers such that 2x² -6y² +z² =0，6x² -2y² -z² =0，then the value of

x 2 -xz+ z 2

x 2 +yz+ y 2

is______．（positive numbers：正数；the value：值）

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唯译共回答了22个问题 | 采纳率95.5%: 由x，y，z是正数，2x² -6y² +z² =0，6x² -2y² -z² =0，
两式相加得出x=y，
把x=y代入2x² -6y² +z² =0，
解得：z=2y，
把x=y，z=2y代入

x 2 -xz+ z 2
x 2 +yz+ y 2 =
y 2 -2 y 2 +4 y 2
y 2 + 2 y 2 + y 2 =
3
4 ．
故答案为：
3
4 ．; 1年前

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ensure the work is done .
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或者：
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但我觉得,不需要再讲“省下了时间可以帮助……”,因为你前面一直在讲省时省时,有点啰嗦了
可以用一个现在分词直接接在前一句末尾：
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-.Additionally,employers do not have to pay for office rental as there is no one……
11.and industries would solve how to manage the workers more properly by using their own methods.
-and industries would solve the problem how to manage ……
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Do we use a comparative or a positive adjective or adverd wi Do we use a comparative or a positive adjective or adverd with as ……as and not as……as? 小猪的猪猪1年前1: 害虫甲共回答了24个问题 | 采纳率87.5%

We use a positive adjective with as ……as and not as……as.
请及时采纳,多谢!

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A primer in positive psychology A primer in positive psychology 这是一本书的书名,不知该如何翻 If Dr.Wheeler’s 10 Simple Solutions to Stress could be put into a pill,it would be prescribed in record numbers. Sometimes it seems that life comes at you in a rush.One day follows the next,and before you realize it,another week has gone by,then a month ,and then a year,the older you get,the more pronounced this stressful in practical ways,but it’s also stressful in the existential sense . 这两句麻烦翻一下,总觉得不太理解句中含义. piaoxue123456781年前1: lvfanghong812 共回答了14个问题 | 采纳率78.6%

正向心理学入门
如果W博士的十个强调（）的解决方案可以放在一个药片里的话,那么就可以记录在案了.
有时候你会发现时间过得太快,一天一天的.在你还没反应过来时,一周又过去了,然后是一个月,一年...年龄越大,这个在日常生活中的重要性就越明显,在存在感中也一样.

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Determine the number of positive divisors of 18 800 that are Determine the number of positive divisors of 18 800 that are divisible by 235. 安妮方方1年前1: lom5a41pb5a__fc 共回答了17个问题 | 采纳率70.6%

确定数量的除数的18 800发现可被235整除

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英语翻译to test whether smoking has a positive effect on the men 英语翻译 to test whether smoking has a positive effect on the mental capacity of smokers put the subjects through increasingly complex tests beat Non-smokers were not better than other subjects in performing simple tasks smokers may prove unequal to handing emergency cases havoc来咯1年前3: tenglong2001 共回答了17个问题 | 采纳率94.1%

为了验证吸烟对人的脑容量是否有积极的影响
把主科放到逐渐复杂起来的测试中
打败/打/节奏
不吸烟的人在完成简单任务中不比在其他科目中表现好
吸烟者可能在处理紧急事件中（与不吸烟者能力）不平等

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7、The sum of n different positive integers is less than 50.T 7、The sum of n different positive integers is less than 50.The greatest possible value of n is（） （A）10 （B）9 （C）8 （D）7 叶罗江南1年前2: 幽谷遂共回答了20个问题 | 采纳率90%

没问题

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有人知道吗Mechanism of Positive Inotropic Effect of Digitalis linhai0001年前1: shinezhen 共回答了15个问题 | 采纳率86.7%

• Inhibition of Na+•K+-ATPase results in intracellular accumulation of sodium.
• Activation of a membrane Na+-Ca2+ carrier results in intracellular accumulation of calcium.
• Increase the amount of free intracellular calcium by displacing of membrane-bound calcium.
Increase the amount of free intracellular calcium by releasing stored calcium from SR

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matlab Subscript indices must either be real positive intege matlab Subscript indices must either be real positive integers or logicals错误 a=[1,2,3,4,5,6,7,8,9,10]; for i=1:length(a)/2 b(i)=a(2i); end 以上举个例子,实际向量要长得多,就是把原向量a每隔一个数取一个数再组成一个长度为原来二分之一的向量b,为何会出现Subscript indices must either be real positive integers or logicals.的错误? 几木长口1年前1: 可爱萱共回答了12个问题 | 采纳率100%

a=[1,2,3,4,5,6,7,8,9,10];
for i=1:length(a)/2
b(i)=a(2*i);
end
改成上面的,b(i)=a(2*i);这句中乘法要加运算符的

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英语翻译The sum of n different positive integers is less than 50 英语翻译 The sum of n different positive integers is less than 50.The greatest possible value of n is（） cnihc20001年前2: 情舞枫阳共回答了20个问题 | 采纳率95%

n个不同的正整数的和是小于50.其中n的最大值可以是（）

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英语翻译1.Jane Eyre’s optimistic attitudeJane takes a positive a 英语翻译 1.Jane Eyre’s optimistic attitude Jane takes a positive attitude towards life and she believes that she would reach her life’s aim based on her hard work.She suffers a lot of hardships,which is far more than many people,which are most women cannot bear.However,because of her superior inner power,she gains what she wishes.She cherishes friendship with Helen and Temple.She does not judge a person according to the appearance.She probes people’s inner world,tries to find beauty,which could lead to her march on forever.Helen and Temple appear to be Jane’s teachers who tell Jane the right attitude toward people and the world,Jane absorbs their peaceful,kind creed and take on a similar world’s view,this is Jane’s spiritual prop.Apart from them,she gets more knowledge from books and experiences,and she is sensitive to feeling and beauty in life,enjoying them and absorbing them; she is a thin flower,but she is strong,brave,faithful and persistent.She describes the world with her heart; Her life is hard,but beautiful.She always insists on her belief.And never lose hope to anything,which she thinks available to her. gupei_1121年前1: qiqigrass 共回答了18个问题 | 采纳率77.8%

简爱的乐观态度
简持积极态度面对人生,她认为,她将她的生活达到的目标的基础上她的辛勤工作.她遭受了很多困难,这是远远超过很多人来说,这是大多数妇女无法承受.然而,由于她的卓越的内在动力,她获得了她的愿望.她珍视友谊,海伦和寺.她不评判一个人根据外观.她探头人们的内心世界,寻找美丽,这可能导致她三月永远.海伦和寺似乎是简的老师告诉简谁的权利的态度人民和整个世界,简吸收他们的和平,友好的信念,并采取了类似的看法,这是简的精神支柱.除了他们之外,她获得了更多的知识和经验的书籍,她很敏感的感觉和生活中的美,享受他们和吸收他们,她是一个薄花,但她坚强,勇敢,忠诚和持续的.她介绍了世界上她的心,她的生活是艰苦,但美丽的.她始终坚持她的信仰.和从未失去希望的任何东西,因为她认为,提供给她.

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if the tens digit x and the units digit y of a positive inte if the tens digit x and the units digit y of a positive integer n are reversed,the resulting intger is 9 more than n.What is y in terms of a 10-x b 9-x c x+9 d x-1 e x+1 kid_19841年前1: 豹2008 共回答了22个问题 | 采纳率95.5%

问题：如果把一个正整数n的十位数x和其个位数y相颠倒,得到的整数是9,请用x表示y（那个more than n 我真心没看懂.）
回答：我感觉应该选择b.9-x
如果按照题意走的话,x=9,y=0,所以x+y=9

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关于英语口语对话帮我写个呗话题是What are the positive and negative effects o 关于英语口语对话帮我写个呗 话题是What are the positive and negative effects of a virtual life?s时间为三分钟,两个人对话的形式还有个话题是FOR boys ：Do you wish to marry a superwoman?Why or why not?/for girls:Do you think a good marriage is more important than a good career?Give your reasons.也是三分钟两个人对话的形式. 就是以这两个为话题的三分钟的小对话....自己设置情境就行....我追加分数的.... 俏笑娃1年前2: seeo 共回答了18个问题 | 采纳率94.4%

感觉题目有点不清楚额,有更详细点的吗?

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his works mirrored such positive values as cheerfulness and his works mirrored such positive values as cheerfulness and kindness怎么翻译呢? jyghcw1年前3: 火神祝融共回答了20个问题 | 采纳率85%

他的作品反映了诸如快乐和善良这种积极的价值观.

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英文中的加减乘除add和plusminus和subtract的区别还有就是正负的说法positive和plusnegat 英文中的加减乘除 add和plus minus和subtract 的区别 还有就是正负的说法 positive和plus negative和minus 乘除是不是就是 multiply和divide lantianbaiyu1年前3: wj371 共回答了13个问题 | 采纳率92.3%

无分别,就是加与和(减与差)表达上的差异;正负与加减不能混用;乘除有时可以用times of,one+序数词+of表示.

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All the positive integers less than 49 are multiplied togeth All the positive integers less than 49 are multiplied together.How many zeros will this product end in? 为梦而存1年前1: 陈洪湖共回答了15个问题 | 采纳率86.7%

9个.（nine）

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the positive and negative aspects of new classroom technolog the positive and negative aspects of new classroom technology 急问 只要观点即可,多一点,中文也可以... husheng-ren1年前1: 阮四少他爷爷共回答了16个问题 | 采纳率100%

Technology in the classroom教室里的科技
In contemporary society,being media literate is essential.This includes being able to both interpret media products such as advertising and movies with a critical eye,as well as being able to personally function the various technology and software applications that are currently used in today’s workplace.While some students in both Canada and China find this way of thinking and learning new and challenging,there are resources at Huamei-Bond International College that facilitate teaching these essential skills.After teaching here for almost four months,I can’t help but draw some comparisons between Chinese and Canadian schools regarding the availability and reliability of technology in the classroom.
In Canada,many classrooms share one digital projector.This can cause a hassle for teachers who wish to incorporate information technology into their lessons,because there are often many teachers sharing the same equipment.I find this particularly frustrating,as I often use Power Point in my teaching.Using visuals is especially important when teaching English as a second language for students to be able to attain object-word recognition.For example,being able to show students an image of Niagara Falls,with the use of computer technology,is much more effective than simply trying to describe this famous Canadian wonder with words and sketching images on the chalkboard.Here at Huamei-Bond,I was pleasantly surprised by the audio/visual equipment available in each classroom.Knowing that I have a dependable digital projector and television set relieves the stress that I would have undergone in Canada over procuring the proper technology for any given lesson.Furthermore,the fact that there is one present in every classroom motivates me to make further use of the equipment,because I know I will not have to worry about its availability.As a result,students are exposed to more visual stimuli,and further enhancement of their understanding of the subject being taught.
To be competitive,it is imperative that teachers and students keep up with the latest skills and technology.These are considered necessary to the ever-changing work environment.It is also important to note that our students,when attending university in Canada,will be expected to have considerable computer and technological skills.Here at Huamei-Bond,the resources are well in place to guide our students towards this goal.

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The positive and negative effects of CET The positive and negative effects of CET 具体说说它的利与弊表现在哪些方面 qoslapcx1年前1: 老陈212 共回答了16个问题 | 采纳率87.5%

CET(大学英语考试)的利和弊!
利（好的一方面）：
A>使英语得到大面积的推广;
B>提高了中国学生的英语水平；
弊（不好的一方面）：
A>过分的强调学生的应试能力而导致学生的英语交际能力下降；
B>容易误导学生使学生将学英语看作一种应付差事而非交际语言进行好好学习.最终还是学无所用,浪费许多时间和精力.
先说这些吧,英语是门语言,把它当作和汉语一样的语言进行学习和运用,就一定会感觉自有乐趣在其中!

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介词的用法.如she shows a very positive attitude to her work.为什么要用t 介词的用法.如she shows a very positive attitude to her work.为什么要用to而不用in.还有The pictures was attached to the wall by a nail.为什么不用on要用to.还有The atmosphere over debate was warm and friendly.为什么不用in要用over.请老师指教. zhangyanx1年前1: 何若希共回答了27个问题 | 采纳率85.2%

attitude to sth 固定搭配 ”对...的态度“
in the debate=over debate "整场辩论会”

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英语翻译There is a positive association between the debt to asse 英语翻译 There is a positive association between the debt to assets ratio and the likelihood of failure,and there is an additional positive impact on the probability of failure if above-average capital gearing coincides with the firm making a loss. 主要是“if above-average capital gearing coincides with the firm making a loss.”,感觉翻成“如果高于平均水平的资本杠杆率与公司的损失达成一致”的话无法理解, 王啸坤有了1年前1: 358427483 共回答了19个问题 | 采纳率100%

两者之间存在正相关的债务资产比率和失败的可能性,并有一个额外的正面影响,如果失败的概率高于平均水平的资本杠杆比率与公司的损失作出了一致.

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____yourself with positive people,you will keep focused on w ____yourself with positive people,you will keep focused on what you can do instead of what you can't. A Surrounding B Surrounded C Surround D Having surrounded kkkkkk了俺1年前3: 我的网名被人抢了共回答了18个问题 | 采纳率72.2%

选A surround yourself with people 与...结交

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If x，y and z are positive

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