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解释浅滩的年际周期变化及多年周期性变化?
答案：
浅滩的年际周期变化和多年周期性变化是河流动力学和河口动力学研究的重要内容，它们通常受到多种因素的影响，包括河流流量、沉积...
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问答题
Listen to 6 Minute English “The Earth’s Core” and answer the following questions. 1. What does the science fiction Journey to the Centre of the Earth tell? 2. How do the travelers to the core of the earth come out in the fiction? 3. How many layers does the Earth have and what are they? 4. What is the freezing point of iron? 5. Why is life possible according to the talk concerning the structure of Earth? 6. How big is the Earth’s inner core?
Listen to 6 Minute English “The Earth’s Core” and answer the following questions. 1. What does the science fiction Journey to the Centre of the Earth tell? 2. How do the travelers to the core of the earth come out in the fiction? 3. How many layers does the Earth have and what are they? 4. What is the freezing point of iron? 5. Why is life possible according to the talk concerning the structure of Earth? 6. How big is the Earth’s inner core?
答案：
由于我无法直接访问外部内容，包括音频文件，因此无法直接收听“6 Minute English”节目。不过，我可以根据我所...
