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【单选题】
听力原文：男：芳芳，再给我一次机会吧，我以后一定会对你好的。 女：你早干什么去了? 问：女的是什么态度? (20)
A.
拒绝
B.
感动
C.
推辞
D.
接受
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【简答题】已知二次型f(x1，x2，x3)=5x12+5x22+cx32一2x1x2+6x1x3一6x2x3的秩为2。求参数c及此二次型的矩阵的特征值。 f(x1，x2，x3)=x12+2x22+2x1x2—2x13；
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【单选题】A:Stuart, how's it going?
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Great, thanks.
B.
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C.
I'm going to finish the PowerPoint for tomorrow's presentation.
D.
Well, yes. But I think I can make it better.
E.
Thanks for the invitation. I'll work on the presentation until eight and then join you for dinner.
F.
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【单选题】上图中哪一幅更合乎“无衣无褐”中穿着“褐”的阶层?
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【简答题】已知二次型f(x1，x2，x3)=mx12+mx22+mx32+2x1x2+2x1x3—2x2x3，则当m为何值时，f是正定的；当m为何值时，f是负定的?
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【简答题】已知二次型f(x1，x2，x3)=x12+5x22+x32+2x1x2+2ax2x3为正定二次型，则a的取值范围是——．
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【简答题】已知二次型f(x1，x2，x3)=5x12+cx32一2x1x2+6x1x3—6x2x3的秩为2，求参数c及此二次型对应矩阵的特征值．
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【简答题】What are Stuart and Steve doing at the moment? Which tense is used? Why?
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【单选题】A:Stuart, how's it going?
A.
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B.
What time are you going?
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