Charles Babbage is generally considered ________ the first computer.

A．to invent

B．inventing

C．to have invented

D．having invented

肩关节脱位常合并的骨折是（）

A.肱骨头骨折

B.肱骨解剖颈骨折

C.肱骨外科颈骨折

D.肱骨大结节撕脱性骨折

E.肱骨小结节骨折