31. One kind of tools which are in common use for daily maintenance works on the ship delivers an impact momentum to an object. The tool comprises a handle and a head with most of the weight. The common uses of the tool are for driving nails, fitting parts, and breaking up objects. What tool is above description?
(A) Drill
(B) Screwdriver
(C) Pliers
(D) Hammer

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統計： A(28), B(40), C(15), D(59), E(0) #1950324