Togethertheseinventionshugelyreducedthecostofblastingrock,drillingtunnels,buildingcanalsandmanyotherformsof____work.
A.construction B.information C.animation D.imagination正确答案A
Togethertheseinventionshugelyreducedthecostofblastingrock,drillingtunnels,buildingcanalsandmanyotherformsof____work.
A.construction B.information C.animation D.imagination正确答案A