Anewtechnique_____,theoutputoftheshirtfactoryincreasedby50percent.
A.having been worked out B.has introduced C.having worked on D.has been turned out正确答案A
Anewtechnique_____,theoutputoftheshirtfactoryincreasedby50percent.
A.having been worked out B.has introduced C.having worked on D.has been turned out正确答案A
