【单选题】(2006.10) An ______idea suddenly came upon him when he was taking a walk with his wife.
【判断题】奈奎斯特曲线包围(-1,j0)点,则系统不稳定。
【单选题】缺铁性贫血采用铁剂治疗,观察疗效最早的指标是
【单选题】He was taking a _____ by overtaking on a bend.
【判断题】Trump admitted that he was taking a protectionist view of economy.
【单选题】He seems _________the homework, for he was taking a walk on the playground. [ ]
【单选题】缺铁性贫血采用铁剂治疗,观察疗效最早的指标是
【单选题】缺铁性贫血采用铁剂治疗,观察疗效最早的指标是