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【简答题】
已知矩阵Y (1). 计算矩阵的行数和列数,存于变量m和n。 (2). 对矩阵各列按降序排列(独立排序),存于变量A。 (3). 对矩阵各行按升序排列(独立排序),存于变量B。 (4). 按第1列元素升序进行行排序,存于变量C。 (5). 按第3列元素降序进行行排序,存于变量D。 (6). 求各列的方差,存于变量v。 (只写程序,不要计算结果。以文字输入作答,不要截图。)
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【单选题】听力原文：M: Why do you look so pale? What's wrong with you? W: I have a terrible headache. Q: What do we know about the woman? (10)
A.
She is sad.
B.
She is upset.
C.
She is nervous.
D.
She is ill.
【单选题】听力原文：M: Why do you look so worried? Only one has finished ahead of you. W: I've promised my Mom that I'd be the first. Q: Why is the woman worded? (17)
A.
Because she didn't fulfill her promise.
B.
Because she can't finish the job ahead of schedule.
C.
Because her mother would be very angry.
D.
Because she would be the last to finish the job.
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