题目内容:
According to the passage, the use of other metals in gold alloys________.I . can be used to make the gold different color
Ⅱ. makes jewelry more expensive
Ⅲ. makes gold more flexible A.I only
B.Ⅰ and Ⅱ only
C.Ⅱ and Ⅲ only
D.I ,Ⅱ,and Ⅲ
参考答案:
答案解析: