A-A+
The author's explanation of how deep events oc
问题详情
The author"s explanation of how deep events occur would be most weakened if which of the following were discovered to be true？
A．Deep events are far less common than shallow events.
B．Deep events occur in places other man where crustal plates meet
C．Mantle rock is more ductile at a depth of several hundred kilometers than it is at 50 kilometers.
D．The speeds of both P and S waves are slightly greater than previously though.此题为多项选择题。请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
解析：最后一段Wadati’s work suggested that deep events occur in areas(now called Wadati-Benioffzones)where one crustal plate is forced under another and descends into the mantle．故如果科学发现deep events不是发生在这个区域，那么作者对它如何发生所做的解释便难以成立。
