Over the course of the school year, Rose became popular and easily made friends wherever shewent.
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There are only two secrets to staying young, being happy and achieving success.
A. 对
B. 错
Don't keep silent during the meeting. I want to hear your opinion
A. 对
B. 错
What is vour dream?
A. 对
B. 错
设三阶方阵A的特征值为1,2,3,则detA=______。