问题
判断题
地震波的传播速度，以横波最快，面波次之，纵波最慢。
答案
参考答案：错
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地震波的传播速度，以横波最快，面波次之，纵波最慢。
参考答案：错
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Camera was invented by Joseph Nicephore. Niepce in 1827. It's used for taking pictures. There are many great inventions in the world. Here is a short introduction. |