一位历史学者认为道光皇帝的墓修筑的比其他帝王的墓都要矮小时，他认为这是因为“在他手上打败了仗，丢失了土地，没有面目见先帝”。这里所说的“丢失”的土地是指（　　）

用实验证明Mg、Fe、Cu三种金属的活动性顺序，可选择

用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）。

      My grandfather is seventy years old, ____  he is still very healthy. He is tall and of medium ____ . He has short straight white ____ He likes reading. Every morning he ____  up very early and then reads morning ____ . When he reads, he always wears ____ . He also likes ____  chess, too. He always plays chess with his ____  friends. He ____  plays chess with me. Why? Because I ____ play chess.