关于腹膜腔的正确说法是（）

A.由浆膜围成

B.由粘膜围成

C.由腹壁围成

D.腹膜腔即腹腔

E.由壁层腹膜和腹壁共同围成

The officer in charge of the deck watch in port shall not（）.

A.make rounds to inspect the ship at appropriate interals

B.take every precaution to prevent pollution of the environment by the ship

C.enter, in the bell book, all important events affecting the ship

D.offer assistance to ships or person in distress