题目内容
【B15】
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听力原文： A small girl and his mother were having a walk in the country when it suddenly began to rain very hard. They did not have their umbrellas with them, and there was nowhere to hide from the rain, so they were soon very wet, and the small girl did not feel very happy.
For a long time while they were walking home through the rain, the girl was thinking. Then at last she turned to her mother and said to her, "why does it rain, Mother？ It isn't very nice, is it？"
"No, it isn't very nice, but it's useful," answered her mother. "It rains to make the fruit and the vegetables grow for us, and to make the grass grow for the cows and sheep."
The girl thought about this for a few seconds, and then he said, "Then, why does it rain on the road too, Mother？"
Where were the small girl and her mother having a walk？
伤寒病人出现的最严重的并发症是（）
对于履行地点约定不明确的,()为适当履行地。
关于摩擦力，下列说法正确的是：
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