The main idea of the last paragraph is that ______ .
A. London still keeps buildings familiar to Dickens so as to commemorate him
B. many places in London offered inspirations to Dickens
C. a museum has been set up in honour of Dickens
D. for all the drastic changes, some places are still reminiscent of London in Dickens's time
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相关系数γ是描述回归方程线性关系密切程度的指标，γ越接近1，x和y之间的线性关系越好。()
A. 正确
B. 错误
Which of the following factors is NOT explictly mentioned in relation to side effects produced by prescription drugs？
A. Sex.
B. Age.
C. Emotional state.
D. Hormonal balance.
所有银行公司信贷产品的有机构成就是()
A. 产品组合
B. 产品定位
C. 产品线
D. 产品项目
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