摄食中枢位于( )

A．延髓
B．中脑
C．丘脑
D．下丘脑外侧区

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