— 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.

— 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.

出自：国家开放大学理工英语4

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