10. The basic function of a boiler _______ is to generate the required amount of heat from a given quantity of the specific fuel.
(A) wind box
(B) furnace
(C) uptake
(D) foundation
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統計: A(20), B(115), C(18), D(17), E(0) #3550069
統計: A(20), B(115), C(18), D(17), E(0) #3550069