【单选题】
0ur jumbo boom can()20 tons.
A、lift
B、rise
C、elevate
D、hoist
A、lift
B、rise
C、elevate
D、hoist
A、at its goose neck to such a extent B、at it's goose neck to such an extent C、at it's goose neck for such a extent D、at its goose neck to such an extent