【单选题】【消耗次数：1】
A: Shall we go out for dinner tonight? B: [填空].
①
You are right
②
Have a nice time
③
Thats a good idea
④
My pleasure
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相关题目
【单选题】
________ you are leaving tomorrow, we can have dinner together tonight.
①
Since
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【单选题】
A: We are going to have a housewarming party tonight. Would you like to join us? B: [填空].
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Im afraid not, because I have to visit my parents
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No, I cant.
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【单选题】
Can you go out with us for dinner this evening?
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No, I already have plans
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Thanks a lot but I’m busy tonight
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No, I really don’t like being with you
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I’m ill, so I shouldn’t go out for dinner
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A: Would you like come to dinner tonight? B: [填空].
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Its your pleasure
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Youre too nice to me
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A: If things go on like this, we shall destroy ourselves. B: [填空]
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Really? Congratulations!
②
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③
Yes, you are good at it.
④
Its none of my business.
【单选题】
______ you are leaving tomorrow, we can eat dinner together tonight.
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For
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矩阵A与B为相似矩阵的充要条件是<img class=jc-formula data-tex=R(A)=R(B) src=https://huaweicloudobs.ahjxjy.cn/93F794F7745AE70AA12AE6F12B6EAF2B.png style=vertical-align: middle;/>.
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正确
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n阶矩阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>与<img class=jc-formula data-tex={ A }^{ T } src=https://huaweicloudobs.ahjxjy.cn/178232F88F2C6F03375305FE1EDCE58E.png style=vertical-align: middle;/>的特征值相同.
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正确
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<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>为<img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>阶矩阵，<img class=jc-formula data-tex={ A }^{ T } src=https://huaweicloudobs.ahjxjy.cn/178232F88F2C6F03375305FE1EDCE58E.png style=vertical-align: middle;/>与<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>的特征值相同.
①
正确
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错误
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对称矩阵一定有<img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>个不同的特征值.
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设A为正交矩阵，且<img class=jc-formula data-tex=\left| A \right| =-1,\lambda =-1 src=https://huaweicloudobs.ahjxjy.cn/0DEF39C0ECE9215107417918F32BACA0.png style=vertical-align: middle;/>是A的特征值.
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<img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>阶矩阵<img class=jc-formula data-tex=A src=https://huaweicloudobs.ahjxjy.cn/53F870B8D448BB3DB08A67264B6329F9.png style=vertical-align: middle;/>与<img class=jc-formula data-tex={ A }^{ T } src=https://huaweicloudobs.ahjxjy.cn/178232F88F2C6F03375305FE1EDCE58E.png style=vertical-align: middle;/>的特征向量一定相同.
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