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【简答题】
某小组同学想证明废电池是否真的对生物有不利影响，决定在实验室条件下测定废电池液对种子发芽率的影响。拟使用的材料用具有新鲜种子若干、不同品牌的废电池若干、培养皿、试管、吸管、量筒，烧杯等。请你帮他们完成下面的探究实验： (1)提出问题：废电池液对生物有不利影响吗？ (2)作出假设：_______________。 (3)操作步骤：①．用________和_________1000毫升制备供探究用的废电池液。 ②．为了保证实验结果的可靠性，需要设置对照组吗？_____________。做一组实验行吗？_______。应该怎么做？_____________。 ③．每组实验都要把种子等分成甲、乙、两份，分别用等量的______和______培养。
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