单项选择题
A.SLW B.LSW C.SWL D.FWE
“SWL” means （）.A. safe working loadB. safe work loadC. ...
单项选择题“SWL” means （）.
A. safe working load B. safe work load C. safe worked load D. safely working load
（）do you want the derrick adjusted?A.WhatB.WhereC.HowD....
单项选择题（）do you want the derrick adjusted?
A.What B.Where C.How D.When
Look, the derrick is too high. I want it adjusted （）.A....
单项选择题Look, the derrick is too high. I want it adjusted （）.
A.upwards B.forwards C.downwards D.backwards
