Nanjing is      beautiful city. It is     capital of Jiangsu and      city has many beautiful parks.

A．a; the; a

B．the; the; a

C．a; the; the

D．the; a; the

对骨折愈合最重要的骨痂是（）。

A.外骨痂

B.内骨痂

C.环状骨痂

D.腔内骨痂

E.纤维性骨痂