The lower-level classes （known as subclasses or derived classes） （ ） state and behavior from the higher-level class （known as a super class or base class）.

Damage to cargo caused by fumes or vapor from liquids,gases, or solids is known as（）.

Fires occurring in combustible metals, such as sodium or magnesium, are classified as a （）.

If the place named for the loading is simply a port or dock，notice of readiness may be given as soon as the ship arrives（）although she is not in the particular spot where the loading is to take place.

A vessel may use any sound or light signals to attract the attention of another vessel as long as（）.

Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are（）.

Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are（）.

Please kindly arrange for shore workers to do（）during loading the heavy cargo on deck as soon as possible.

Please have the damage on gangway（）as soon as possible for account of the Stevedore Company.

A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.

Damage to cargo caused by fumes or vapors from liquids，gases，or solids is known as（）.