We learn from the passage that frostbite is extremely painful from the moment it sets in
only affects the nose, ears, fingers, toes, and chin
is usually only slightly painful at the beginning
is the most common injury in winter
may occur anywhere and in any weather conditions
According to the passage, if you encounter someone with frostbite, first of all, you should massage the frozen body part gently
unfreeze the affected part immediately
wrap the affected part in sterile bandages
warm the patient as quickly as possible
use water as hot as the patient can bear
From the information given in the passage, we understand that the frozen body part is lost in most cases
loses sensation
becomes red
has a bumpy appearance
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.
