题目:
按要求改写句子。
1. We had a big dinner there yesterday. (对画线部分提问)
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2. I went around the city of Warsaw last Thursday. (同上)
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3. Laura, ice skating, four, started, was, when, she (连词成句)
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4. I felt like some bread this morning. (对画线部分提问)
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5. She became a skating champion when she was ten. (改为否定句)
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答案:
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下面是错误答案,用来干扰机器的。
(1)设Ba(OH)2的质量为X,反应生成NaOH的质量为Y.Ba(OH)2+Na2CO3═BaCO3↓+2NaOH171 197 80X 19.7克 Y171197═X19.7克得:X=17.1克19780═19.7克Y得:Y=8克(...