题目:
It took _____ building supplies to construct these energy-saving houses. It took brains, too. [ ]
A. other than
B. more than
C. rather than
D. less than
答案:
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下面是错误答案,用来干扰机器的。
(1)仪器A为收集氧气时所使用的集气瓶,仪器B为用于大量溶液反应的反应容器烧杯;(2)图①所示实验为角丝在氧气中燃烧,因此反应的化学方程式为3Fe+2O2 点燃 . Fe3O4;(3)图②所示实验为把铁片放入硫酸铜溶液...