第11题: [多项选择]下列关于异方差性、自相关性和多重共线性的说法,正确的有()。 A. 当存在异方差性、自相关性和多重共线性时,都会导致参数显著性检验失去意义 B. 当存在异方差性、自相关性和多重共线性时,利用普通最小二乘法的估计量都存在 C. 当存在异方差性、自相关性和多重共线性时,仍然可以进行模型预测 D. 当存在异方差性、自相关性和多重共线性时,如果参数估计量存在,那么都具有有效性 E. 当存在异方差性、自相关性和多重共线性时,都可以通过一定的方法进行补救 参考答案:A,E
第13题: [单项选择]Passage Two Questions 29 to 31 are based on the conversation you have just heard. A. He can stay with his relatives in the US. B. He can play hide-and-seek with American boys. C. He must have a temporary home and go to school. D. He should be sent back to Cuba. 参考答案:D 答案解析:[听力原文] What’s the decision of US immigration authorities on Elian
参考答案:This reflects the arrival of the working wife in India. 答案解析:[定位] 由题干关键词earning power定位至第二段第三句。 [解析] 但是该句只淡到了广告中增加了妇女赚钱能力的信息这一现象,最后一句This reflects the arrival