Guangzhou Baiyun District People's Government Yuncheng Street Office for what to call me to say the epidemic registration

It is possible that the big data monitoring that you have passed by or stayed in places where there may be an epidemic, so said out to investigate the situation, do registration, but there may be fraudulent information, if the other party just ask you about your trip, it is best to cooperate with the answer, but if you say that involves a bank card or download what APP, then basically it is a fraudulent phone call, to hang up directly.

In Shenzhen recently want to go to training big data, which company is reliable some.

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C: Enter a matrix with 4 rows and 4 columns from the keyboard, swap its rows and columns, and enter the swapped matrix. (You can do this with the help of another matrix, or you can

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