A-A+
The transition of the Earth's magnetic field i
问题详情
The transition of the Earth"s magnetic field is possibly caused by ______.
A．the flows of melted iron inside the Earth
B．the periodical movement of the Earth
C．the mechanical energy of the solar system
D．the force corning from outer space请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：A
解析：文章最后一段：谁也不能准确地知道为什么地球磁场会周期性转换，但是科学家说其原因可能在于地壳中融化了的铁的无序流动，它们看起来就像木星上组成云的气体一样。
