Camels arc large animals living in dry areas. There are two species of camels; the Arabian camel with a single hump from the dry desert areas of West Asia, and the Bactrian camel with two humps from Central and East Asia. Camels arc over 7 feet tall and weigh over 1,600 pounds. They will live up to 40 to 50 years. Most camels arc domesticated and fed by people. Camels arc plant-eaters.
Camels are very strong animals with wide，padded feet. They have thick leathery pads on their knees and chest. Camels have nostrils that can open and close, protecting them from the desert environment. Bushy eyebrows and two rows of long eyelashes protect their eyes from sand. Their mouth is extremely tough, allowing camels to eat thorny desert plants. Their widened feet help them move without sinking into the sand. Their thick coats reflect sunlight, and also protect them from the intense heat from desert sand. Their long legs help by keeping them further from the hot ground.
Camels can go without food and water for 3 to 4 days. They do not store water in their humps as is commonly believed. The humps are actually a container of fat. Camels arc incredibly well-adapted to their environment. When conditions heat up, camels can increase their own body temperature, which prevents suiting and therefore water loss. They may not sweat at all during the day.
Camels arc sometimes called“ships of the desert”because people ride them around the hot, dry deserts of the However, the number of camels is becoming smaller for various reasons.
21. According to the passage, camels usually live in .
A. Asia B. Africa C. America. D. Australia
22. Paragraph 2 is mainly about .
A. camels are useful animals B. camels are clever animals
C. camels' body structure and function D. camels' characteristics and habits
23. The reason why camels lose little water in deserts Is that they .
A. get water from green foods B. can adjust their temperature
C store enough water in the humps D. can manage without water
24. What will the author probably talk about following the last paragraph?
A. Ways to protect camels. B. Habitats of camels.
C. Reasons for raising camels. D. Functions of camels.