①铁钉在潮湿的空气容易生锈②钠着火用水扑灭③铝在空气中耐腐蚀，所以铝是不活泼金属④用酒精灯加热铝箔至熔化，铝并不滴落，说明氧化铝的熔点比铝高⑤青铜、不锈钢都是合金⑥KSCN溶液可以检验Fe³⁺．

你正排队买东西，一个后来的人插到你前面。遇到这种情况，你认为委婉得体的说法是（    ）

    My name is Tom Brown. I am an English boy. (1) I am twelve. I am a middle school student. From Monday to Friday I am very busy. We have six classes a day. At school, I like doing sports, (2) like playing basketball, tennis and soccer. So my favorite subject is P.E.. Mr. White is my P.E. teacher. He is very cool. After school, our P.E. teacher plays games with us. We students all like him. (3) I don't like math because it is too difficult for me. (4) But my math teacher Ms Smith says it is interesting and useful. So I must work hard on it.

爱因斯坦说：“哲学的推广必须以科学成果为基础。可是哲学一经建立并广泛被人们接受以后，它们又常常促使科学思想的进一步发展，指示科学如何从许多可能的道路中选择一条路。等到这种已经接受了的观点被推翻以后，又会有一种意想不到和完全新的发展，它又成为一个新的哲学观点的源泉。”这说明（   ）

①具体科学支撑哲学，又受哲学的影响

②哲学基于具体科学，又指导具体科学

③具体科学与哲学融为一体、无法分离

④哲学是科学之科学，是科学进步的源泉

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