题目:
Chinese public buildings erected under a construction code of the Sung dynasty have withstood earthquakes well because the white cedar used has four times the tensile strength of steel and the timber frame, incorporating many joints and few nails, is flexible.
选项:
A、used has four times the tensile strength of steel and the timber frame, incorporating
B、used in them has four times the tensile strength of steel has and the timber frame, incorporating
C、that was used in them has four times the tensile strength steel has, and the timber frame, incorporating
D、that was used has four times as much tensile strength as steel, and the timber frame incorporates
E、that was used has four times the tensile strength steel does, and the timber frame incorporates
答案:
A