The Hotel Al Arab, ________ the first and only 7-star hotel in the world, was designed in the shape of a

sail of 321 meters.[ ]

A. having been considered

B. considering                      

C. being considered    

D. considered

从期刊论文性质及作用的角度出发，期刊论文的特点有（）

A、原始报道

B、探索创新

C、推翻旧论

D、丰富发展