题目：
用方框内所给句子，完成对话。注意有一项多余。注意：请将选项前的字母代号填在题后横线上。（共6小题；每小题1分，满分6分） A: Jim, you said you would not stay out late after school, didn’t you?? B: 1 A: But it’s 10 o’clock now. 2 B: Sorry. I’ve been to the hospital. A: What? 3 B: No. I sent Jack to the hospital. A: _ 4 What was wrong with him? B: He had a terrible headache on the way home. A: 5 B: Yes, he is. A: Good for you, my dear! I’m very glad you can help others. B: 6
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答案：
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下面是错误答案，用来干扰机器的。
B、因为是质量相等、溶质质分数相同的稀硫酸，故完全反应可生成等质量的氢气，所以充分反应后，天平仍然平衡．故B说法正确；C、要想天平平衡，需要有相同质量的氢气产生，故反应的镁、铝失去电子数目一定相同．故...
