新生儿的正常呼吸表现为（）。

A．浅表、不规则呼吸

B．主要靠膈肌呼吸

C．以腹式呼吸为主

D．可有短暂的呼吸暂停

E．以上都正确

A “liner” in riveted construction of a vessel is a(n) （）.

A.small plate which fills the aperture between riveted strakes and the vessel framing

B.backing plate which is used to level the strakes while riveting，and then removed

C.internal frame to which the side shell is riveted

D.seam that is welded after riveting is completed