Elephants are large mammals of the family Elephantidae and the order Proboscidea. Traditionally, two species are recognized, the African elephant and the Asian elephant, although some evidence suggests that African bush elephants and African forest elephants are separate species. Other families of the order Proboscidea, including mammoths and mastodons are now extinct.

Elephants are scattered throughout sub-Saharan Africa, South Asia, and Southeast Asia. Male African elephants are the largest surviving terrestrial animals and can reach a height of 4 m (13 ft) and weigh 7,000 kg (15,000 lb).

All elephants have several distinctive features the most notable of which is a long trunk or proboscis, used for many purposes, particularly breathing, lifting water and grasping objects. Their incisors grow into tusks, which can serve as weapons and as tools for moving objects and digging. Elephants' large ear flaps help to control their body temperature. Their pillar-like legs can carry their great weight. African elephants have larger ears and concave backs while Asian elephants have smaller ears and convex or level backs.

One of the biggest threats to elephant populations is the ivory trade, as the animals are poached for their ivory tusks. Other threats to wild elephants include habitat destruction and conflicts with local people. Elephants are used as working animals in Asia. In the past they were used in war; today, they are often put on display in zoos and circuses.

根据上文判断对错

Mammoths and mastodons live in Africa.

a.  True

b.  False 

Elephants live in all continents.

a.  True.

b.  False.

Ivory trade is the main threat that elephants are facing.

a.  True

b.  False 

答案
b b a