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【判断题】
若 ,其中 为可逆矩阵,则矩阵 可经过适当的初等行变换变成 。A.
正确
B.
错误
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举一反三
【简答题】课本P.14. Ex. 5: yze the text and the vedio of Yanglan's speech which is printed in the appendix of speeches for appreciation and ysis at the end of the book. Evaluate the speech in light of the...
【多选题】What did Yanglan tell the audience in her speech?
A.
Girls should be beautiful and sweet
B.
Being different is good
C.
Everyone is different
D.
Being different is difficult
【判断题】Yanglan, in the podcast, recommended some place for the Janpanese passenger to have Chinese “Xiao long Bao”and she even wrote down some Chinese memos for the passenger.
A.
正确
B.
错误
【单选题】The quiet girl has_____ since she modelled herself _______ Yanglan .
A.
come to life… on
B.
come to oneself… as
C.
come to light…like
D.
come to nothing… as
【简答题】列车折返方式包括( )和( )。
【判断题】According to the Yanglan, cabin attendants have to pay more attention to the details of their service.
A.
正确
B.
错误
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