单项选择题
A. rope B. cargo wire C. ladder D. All above.
Is this（）longer or shorter?A. cargo wireB. wire cargoC....
单项选择题Is this（）longer or shorter?
A. cargo wire B. wire cargo C. wire of cargo D. heavy cargo
Timber is in （）.A.casesB.bagsC.bundlesD.drums
单项选择题Timber is in （）.
A.cases B.bags C.bundles D.drums
A （）can give power to hoist or lower cargo.A. cargo win...
单项选择题A （）can give power to hoist or lower cargo.
A. cargo winch B. lift winch C. derrick D. crane
