题目内容
We all agree that _______ good knowledge of physics is a must in explaining such _______ natural phenomena.
A. a; / B. a; a C. /; a D. /; /
A
练习册系列答案
相关题目
题目内容
We all agree that _______ good knowledge of physics is a must in explaining such _______ natural phenomena.
A. a; / B. a; a C. /; a D. /; /
A