【单选题】【消耗次数:1】
Tom, what did you do with my documents? I have never seen such a _______ and disorder!
mess
mass
guess
bus
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相关题目
【单选题】 Tom, what did you do with my documents? I have never seen such a____ and disorder!
①  mass
②  mess
③  guess
④  bus
【判断题】 A: What do you do? B: I do well in my studies.
①  正确
②  错误
【单选题】 Never in my life ____ or seen such a thing.
①  I have heard of
②  I had heard of
③  have I heard of
④  did I hear of
【单选题】 What can I do for you, madam?
①  I want a kilo of apples
②  You can go your own way
③  Thanks
④  Excuse me. I’m busy
【单选题】 Do you have any ice? I am used to have a nightcap before I go to bed.What is the meaning of the word “nightcap”?
①  沐浴
②  夜读
③  夜宵
④  睡前饮料
【单选题】 —Hello there, what can I do for you, sir?—_____________________.
①  I can do it myself.
②  No, youre welcome.
③  I would like to buy a pair of glasses.
④  Yes, thank you.
【单选题】 A: Richard, class begins at 9, and you are late. B: I know, but I missed my bus, Im sorry. B: [填空]. You have to be here on time.
①  Thats no excuse
②  Dont mention it
③  You neednt be
④  No problem
【单选题】 Did Tom tell you to water the flowers?
①  No. And so did I
②  No. And neither did I
③  He did And so I did
④  He did And so do I
【单选题】 -May I help you?-___. Do you have any apple juice?
①  Sure
②  Thank you
③  No, thanks
④  I don’t think so
【单选题】 40.—I`m sorry I didn`t do a good job. ---Never mind.____you have tried your best.
①  Aboveall
②  Aboveall
③  Atall
④  Afterall
随机题目
【判断题】 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;/>.
①  正确
②  错误
【判断题】 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.
①  正确
②  错误
【判断题】 <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
②  错误
【判断题】 若n阶矩阵A有n个不同的特征值,则A必能对角化.
①  正确
②  错误
【判断题】 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.
①  正确
②  错误
【判断题】 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.
①  正确
②  错误
【判断题】 <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.
①  正确
②  错误
【判断题】 对称矩阵的特征值均为实数.
①  正确
②  错误
【判断题】 n阶矩阵A能对角化的充要条件是A有n个线性无关特征向量.
①  正确
②  错误
【判断题】 两两正交且不含零向量的向量组是线性无关的.
①  正确
②  错误