[单选题]3D printers have spread from labs to industrialfactories, ____they are being cheaper and cheaper.
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2023-10-01 08:00:11
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[单选题]3D printers have spread from labs to industrialfactories, ____they are being cheaper and cheaper.

A.so
B.and
C.yet
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国家开放大学

形成性考核

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