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题目内容
（国家开放大学理工英语4）
— 3D printing is one of the latest technological innovations.
— ____ Maybe its functions are questionable.
单选题 (10 分) 10分
A.
Really?
B.
Exactly.
C.
I think so.
— ____ Maybe its functions are questionable.
单选题 (10 分) 10分
A.
Really?
B.
Exactly.
C.
I think so.
参考答案
