题目内容

She had been mostly talked about on Facebook all week .

A. 对
B. 错

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Within nine days of the audition, her video had been watched over 200 million times.

A. 对
B. 错

The 1 Susan Boyle became an instant celebrity after her audition on the reality TV show 2 on 3.

矩阵的乘法满足消去律.

A. 对
B. 错

若矩阵可逆，则其逆矩阵唯一.

A. 对
B. 错