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张老师采用哪些教学方法请结合材料加以分析 ‍ ‍ ‍ 张老师在生物课上讲解植物吸水的知识时，首先要求同学动手做个实验：讲两块萝卜分别浸泡在两个装有浓盐水和清水的烧杯里，浸泡后取出并观察萝卜的变化。结果发现泡过浓盐水的萝卜变蔫了，而泡过的萝卜变水灵了。张老师用右方示意图显示实验结果：泡过浓盐水的萝卜失去水分，泡过清水的萝卜吸收水分。 张老师接着进—步提问：谁能概括出萝卜什么状态下失水？什么状态下吸水？ 根据同学们的回答，张老师总结说明植物吸水的原理：当植物细胞液浓度小于外界溶液浓度时，细胞就失水；反之，细胞则吸水。接着，张老师布置小组讨论：为什么盐碱地—般种不好庄稼？ 如果你种的植物出现“烧根”现象，你需要追肥还是浇水，为什么？ 最后张老师请各小组汇报讨论结果。 问题： (1)张老师采用哪些教学方法？请结合材料加以分析？ (2)张老师贯彻了哪些教学原则？请结合材料加以分析？
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Monarchs did not allow the people to vote in democratic elections
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they demanded more reformation in England.
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they had different religious belief.
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