试题与答案

It took _____ building supplies to const

题型:选择题

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...

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