The passage is mainly about ______.
A.the features of volcanic activities B.the importance of the theory about drifting plates C.the significance of hot spots in geophysical studies D.the process of the formation of volcanoes正确答案C
The passage is mainly about ______.
A.the features of volcanic activities B.the importance of the theory about drifting plates C.the significance of hot spots in geophysical studies D.the process of the formation of volcanoes正确答案C
