题目内容
天坑属于岩溶引发的地质灾害。
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对于泥石流的形成区,流通区的流速最小。
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Complete each of the following sentences after the model with the word or phrase in brackets. Make changes or additions where necessary.1. If you are afraid that you will fail to make friends, you are probably going to have a very hard time _________________________. (interact)
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