单选题：阅读短文，回答题：Which of the following is the best topic for the pa

题目内容：
阅读短文，回答题：

Which of the following is the best topic for the passage?
A．Idiomatic Meanings of Languages.
B．Language Problems in Foreign Trade.　　Ψ考试大>在线Ψ考试中心Ψ
C．Translation Failures in Foreign Trade.
D．Culture Difference between Languages.
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答案解析：

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Wendy: Do you know what Daisy's boyfriend does?Bill: _______

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求矩阵的特征值及各特征值对应的特征向量．

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分类：英语运用能力测试  题型：单选题
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已知二次型可经正交变换化成标准形，则a＝__________。

已知二次型可经正交变换化成标准形，则a＝__________。

分类：英语运用能力测试  题型：单选题
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