查阅资料：铝与氢氧化钠溶液反应方程式为2Al+2NaOH+2H₂O═2NaAlO₂+3H₂↑（产物NaAlO₂溶于水）；Fe、Cu不与氢氧化钠溶液反应．

猜想1：该合金粉末中除铝外，还含有铁．

猜想2：该合金粉末中除铝外，还含有____（填名称）．

猜想3：该合金粉末中除铝外，还含有铁、铜．

实验探究：下列实验仅供选择的试剂：10%盐酸、30%NaOH溶液．

探究结论：猜想____成立．

反思：一般来说，活泼金属能与盐酸等酸反应，而铝与酸、碱都能反应，说明铝具有特殊的性质．写出铝与稀盐酸反应的化学方程式____．

【拓展与分析】（注意：若答对本小题奖励4分，化学总分不超过60分）

请设计两个不同的实验方案，验证铝、铜的金属活动性强弱．

方案一：____；

方案二：____．

【总结归纳】由上述实验得出比较金属活动性强弱的方法有：

①____；②____．

    Gustavo's favorite sport is soccer. When he was only four, his older brother taught him how to play it. Now Gustavo is eight, and he has had a lot of 1 Gustavo' s brother likes to kick (踢) the ball with his right foot (脚), 2 Gustavo doesn't. He likes to kick it with his left foot. Gustavo calls it his lucky left foot. All of Gustavo's friends love to play soccer when they get out of 3 .

    Earlier this year a new boy came to Gustavo's school. His name is Felipe. One day, the boys asked Felipe to play soccer with them after school. Felipe said OK but looked very  4 .

    As they walked to the soccer field (足球场), Gustavo asked Felipe, "Are you all right? " Felipe said, "I don' t know how to play soccer. I tried once and everybody 5 me." "Don't worry," said Gustavo. "I was really bad too when I first started playing soccer. 6 just have to keep trying."

    The game started, and Gustavo moved to the front of the field and was ready to kick the ball with his lucky left foot. Gustavo felt 7 every time he played soccer and today he was playing even better than usual.

    After the game, Gustavo and Felipe stayed on the field to practice. Felipe was a little bit 8 . Then Gustavo and Felipe practiced on the soccer field every day after the other boys 9 Felipe also practiced before school.

    Now Felipe loves playing soccer, and Gustavo has a new 10 Gustavo believes that Felipe will be able to score his first goal (进球) soon.

A、B是两个轻质泡沫小球，C是用毛皮摩擦过的橡胶棒，A、B、C三者之间相互作用时的场景如图所示，由此判断（   ）