問題詳情
【題組】25. Why does the author mention feldspar in line 10?
(A) It is often used as a substitute for clay.
(B) It is damaged by the oxides in clay.
(C) Its presence indicates inferior clay.
(D) It is a major component of clay.
參考答案
答案：D
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)