题目内容

U105 Directions: Complete the following passage with words chosen from this unit. The initial letter of each is given.When a person is born, he / she has a set of personalities that make him / her different from others. Psycologists believe that colors are sometimes a good way to 1) i____________ how a person behaves and the way he / she 2) r_____________ to things that are happening to him / her. They can also 3) r_______________ personality traits. Nonetheless, we cannot be 4) a______________ sure about a person's characteristics by just looking at his / her 5) p____________ for certain colors.Therefore, we should not be 6) h___________ and critical towards a person just because he / she likes a 7) s______________ color that does not represent some positive traits or characteristics. Psychologists also believe that everyone can develop or change his / her personality. For example, if an 8) i____________ wants to correct his / her negative traits such as his / her immature behavior, he / she has to make an effort to do so. He / she has to be 9) p______________ and keep working hard to ensure that he / she can 10) a ____________ his / her goal. Therefore, if a person is determined, he / she can change the traits he / she inherits from his / her parents. The important thing is to change for the better and not for the worse.

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使用Malthus人口模型进行预测的结果远高于实际人口增长,误差的原因是对增长率r的估计过高。

A. 对
B. 错

在Logistic模型中,将人口增长率修正为一个随着人口的增加而减小的线性函数,也可以表示为一个非线性函数。

A. 对
B. 错

本节内容的研究过程是从Malthus人口模型出发,增加更多的变量,考虑更多的限制条件,然后得到Logistic模型,然后把Logistic方程变成差分方程,然后用纯数学的方法来探讨这个方程有什么样的性质。

A. 对
B. 错

本例中,建模所用的主要理论依据是____定律和____定律。

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