在“观察水沸腾”实验中：
（1）小明观察到水沸腾前和沸腾时，水中气泡上升过程如图1，则图中________是沸腾前的情况。(填“甲”或“乙”)
（2）下表是实验中所记录的数据：
①从记录数据看，在第________min时的数据是错误的，温度应改为________。
②由表中数据得出的结论是：________。
（3）同时，小华也做了该实验。他们根据各自的数据，在同一坐标纸上画出了如图2所示的图线，其中实线表示小明的图线，虚线表示小华的图线，水平部分图线重合。若加热条件完全相同，整个过程中两人的操作都规范准确。根据图线分析：你认为造成两同学图线差异的主要原因可能是：________。
（1）乙
（2）7，98℃；液体沸腾时吸热但温度不变
（3）水的质量不同
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| Anna lived on the side of a valley. One summer, there was a very big 1 , and a lot of houses down below Anna's were washed away. Anna's house was 2 enough to escape the flood, so when the water had 3 and the other houses were standing there 4 no roof and no walls and all covered with mud(泥), her house was just all right. Her house was quite small, her husband was dead, and she had four children, 5 Anna took in one of the families that had lost 6 in the flood and she 7 her home with them until it was 8 for them to rebuild their house. Anna's friends were 9 when they saw Anna do this. They could not understand why Anna wanted to give 10 so much more work and trouble when she already had quite a few children to 11 . "Well," Anna 12 her friends, "at the end of the First World War, a woman in the town where I then lived found herself very 13 , because her husband had been killed in the 14 and she had a lot of children, 15 I have now. The day before Christmas, this woman said to her children, 'We won't be able to have much for 16 this year, so I'm going to make only one present to all of us. Now I'll go and get it.' She came back with a 17 who was even poorer than they, and who had no parents. 'Here's our 18 ,' she said to her children. The children were 19 and happy to get such a present. They 20 the little girl, and she grew up as their sister. Such was that Christmas present." | ||||
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