20.“Gross Tonnage”was measured by .
(A)weight-2240 1b per tonnage
(B)weight-2000 1b per tonnage
(C)space-100 cubic meters per tonnage
(D)space-100 cubic feet per tonnage

答案：登入後查看
統計： A(9), B(5), C(10), D(33), E(0) #1196969