第3题: [单项选择]What do we learn from the conversation A. He feels they have done a wise thing. B. He doesn’t think they should move. C. He thinks it is better to invest later. D. He thinks it is unwise to buy stocks. 参考答案:D 答案解析:[听力原文] W: You know, the Smiths have invested all their money in stocks. M: They may think that
第4题: [单项选择]“斐波那契数列”可以拆分成:()。 A. 两个等比数列 B. 两个等差数列 C. 一个等差数列和一个等比数列 D. 无法拆分 参考答案:A