A:“魔棒”具有神奇的功力使酒精灯点燃
B:高锰酸钾与浓硫酸的混合物能降低酒精灯的着火点,使酒精自发燃烧
C:它们之间发生化学反应,放出大量的热,使温度达到酒精的着火点
D:它们之间发生化学反应,产生大量氧气,酒精在氧气浓度大的环境中能自发燃烧
根据句意及首字母提示完成单词。 It's too hot, we need to drink more w____. Mr. Black looks u____ , but he is a really good man. —How is the salad? —Very d____.—Where is the post office? —It's at the c____ of the street. The movie Avatar is great. We d____to see it again.
雅典城邦民主政治最终确立于( )