The self-contained breathing device should not be used in which situation?（）

When starting CPR on a drowning victim，you should（）.

All the traces are（）old ones.

The key to rescuing a man overboard is（）.

Generally speaking，the most favorable bottom for anchoring is（）.

Physical exertion on the part of a person who has fallen into cold water would（）.

Which hazard probably would NOT be encountered when entering an empty but uncleaned fish hold?（）

Which is NOT a part of an anchor?（）

Which oil is not suitable for use as storm oil?（）

In each inflatable rescue boat，what piece of equipment is provided to make quick，emergency，temporary repairs to a large hole in a raft?（）.