1. Nobody can e_________ (生存) without air or water.

2. The new hospital will be of great b_________ (好处) to the town.

3. She was a________（授予）a medal for bravery..

4. Marry was such a good teacher that she showed great p_________ (耐心) with her pupils.

5. Water had also appeared on other planets like Mars but, u__________ (不像) the earth, it had disappeared later.

试述伤寒的极期临床表现特点。