“横空出世一战中，社会制度初显优；二次大战建大功，一朝解体两极终”。文中描写的国家是

A．美国

B．英国

C．法国

D．苏联

In ship construction, frame spacing is（）.

A.greater at the bow and stern

B.reduced at the bow and stern

C.uniform over the length of the vessel

D.uniform over the length of the vessel, with the exception of the machinery spaces, where it is reduced due to increased stresses