1 the best recruiting agents

We learn from the passage that frostbite

1. 
   is extremely painful from the moment it sets in
   
2. 
   only affects the nose, ears, fingers, toes, and chin
   
3. 
   is usually only slightly painful at the beginning
   
4. 
   is the most common injury in winter
   
5. 
   may occur anywhere and in any weather conditions
   

2. 
   According to the passage, if you encounter someone with frostbite, first of all, you should
   

1. 
   massage the frozen body part gently
   
2. 
   unfreeze the affected part immediately
   
3. 
   wrap the affected part in sterile bandages
   
4. 
   warm the patient as quickly as possible
   
5. 
   use water as hot as the patient can bear
   

3. 
   From the information given in the passage, we understand that the frozen body part
   

1. 
   is lost in most cases
   
2. 
   loses sensation
   
3. 
   becomes red
   
4. 
   has a bumpy appearance
   
5. 
   should be rubbed for rapid rewarming
   

49 UNFAIRNESS TO THE PIG
Few animals have such economic significance to mankind yet suffer from such a deplorable image as does the pig. As a domestic animal, it is a source of a wide variety of meats, high-quality leather, durable bristles for many kinds of brushes, and hundreds of medical products. At the same time, the pig is frequently regarded as unclean and even untouchable by many people. In spite of their reputation, pigs are neither filthy nor stupid. Because their sweat glands are relatively ineffective in lowering body temperature, pigs seek relief from the heat by wallowing in mud or shallow waterholes. When provided with? a clean environment sheltered from the sun, however, pigs are fastidious. Furthermore, in tests of intelligence, pigs have proved to be among the smartest of all domestic animals - even more intelligent than dogs.

1.