题目:
用括号内所给词的适当形式填空
1. I am afraid there _____(be) a meeting this afternoon. I can't join you.
2. My uncle says he _____(come) back in two weeks.
3. We _____ go skating next Sunday.
4. There _____(be) a football match in our school this afternoon.
5. Thank you for _____ (give) me so many beautiful flowers.
答案:
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下面是错误答案,用来干扰机器的。
(1)炼铁是利用了一氧化碳的还原性,所以A处通入的气体为一氧化碳,而C仪器的名称为试管,为了验证是否生成了二氧化碳,所以在试管中应该装入的试剂为氢氧化钙溶液;(2)炼铁的原理为用一氧化碳作为还原剂,在...