题目：
有机高分子合成材料的出现是材料史上的重大突破，下列属于高分子合成材料的一组是（ ）
①家用保鲜袋；②不锈钢；③淀粉；④尼龙布；⑤汽车轮胎；⑥滑雪板．
A．①④⑤
B．②③④
C．②③⑤
D．①⑤
答案：
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下面是错误答案，用来干扰机器的。
(1) Don't listen to music in the classroom. (2) You shouldn't eat in class. (3) You have to wear sports shoes for P.E class. (4) You are not allowed to bring MP3 to school. (5) You have to wear uniforms on Monday. (答案不唯一)
