设二次型 满足=2,AB=O,其中.用正交变换化二次型为标准形,并求所作的正交

题型:问答题

问题:

设二次型


满足

=2,AB=O,其中


用正交变换化二次型为标准形,并求所作的正交变换

考点:普通考研考研数学(三)考研数学三
题型:问答题

Once there was a little girl who lived in a small, very simple, poor house on a hill. From there she could see across the valley to a wonderful house high on the hill on the other side. This house had golden windows, so golden and shining that the little girl would dream of how magic it would be to grow up and live in a house with golden windows instead of an ordinary house like hers. She wanted to live in such a golden house and dreamed all day about how wonderful and exciting it must feel to live there.

When she got to an age and got enough skill and sensibility to go outside, she asked her mother if she could go for a ride outside the gate and down the lane. After pleading with her, her mother finally allowed her to go, insisting that she should keep close to the house and not wander too far. The day was beautiful and the little girl knew exactly where she was heading! Down the lane and across the valley, she got to the gate of the golden house across on the other hill.

As she arrived, she focused on the path that led to the house and then on the house itself. She was so disappointed as she realized all the windows were ordinary and rather dirty, reflecting(反映出) nothing other than the sad neglect of the house that was derelict(废弃的).

So sad she didn't go any further and turned, and heart broken. As she glanced up she saw a sight to amaze her. There across the way on her side of the valley was a little house and its windows glistened golden as the sun shone on her little home.

She realized that she had been living in her golden house and all the love and care she found there was what made her home the “golden house”. Everything she dreamed was right there in front of her nose! 

小题1:Which sentence is True according to the passage?

A.The girl’s mother finally allowed her to go to the golden house alone.

B.The golden house was on the hill where the girl lived.

C.What disappointed the little girl was that the house was locked.

D.Actually, the windows of the golden house were common and covered with dirt.小题2:What can we infer from the passage ?

A.The girl didn’t love or care for her parents

B.The girl had no idea where she was heading after leaving home

C.The mother thought that she needn’t keep an eye on her daughter

D.The girl made up her mind to go to the golden house at the beginning小题3:The passage is intended to tell us that_____.

A.not all dreams will come true

B.girls often have amazing imagination

C.what we dream of may be just around us

D.nothing is impossible to a willing heart

题型:问答题

心肌梗死后出现Ⅲ度房室传导阻滞应予注射普鲁卡因酰胺。()

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标志着当代护理思想和观念重大变革的是()

A、整体护理

B、心理护理

C、基础护理

D、社区护理

E、家庭病床护理

题型:问答题

女性患者,因水肿就诊,确诊为慢性肾小球肾炎,最先发现水肿的部位是( )。

A.眼睑和下肢 B.躯干
C.胸腔和腹壁 D.臀区

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长沙产假工资最低标准是多少?

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