原题
录音 1
What does the speaker imply about volcanic ash?
AIt provides evidence that volcanoes damaged Roman buildings.
BIts presence in Roman buildings was discovered only in recent decades.
CIt is less important for the durability of ancient Roman buildings than researchers used to believe.
DIts use may lead to improvements in modern building techniques.
正确答案：C
解题思路
老师暂未填写解题思路。