When working with lumber，wire and staples are not desirable to be used because ______．A.They are not subjected to cause troubleB.They are difficult to handle this kind of cargoC.The efficiency of separating is raisedD.The efficiency of loading is greater
When working with lumber，wire and staples are not desirable to be used because ______．
A.They are not subjected to cause trouble
B.They are difficult to handle this kind of cargo
C.The efficiency of separating is raised
D.The efficiency of loading is greater
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