A documents can create a (an) ______ barrier if it is smudged, contains errors in content, spelling, or grammar. <br />A.external <br>B.internal<br>C.formal

A documents can create a (an) ______ barrier if it is smudged, contains errors in content, spelling, or grammar.
A.external
B.internal
C.formal

出自：国家开放大学婚姻家庭法学

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