根据第一段中的African elephants have larger ears,and both male and female African elephants have tusks(象牙)while only male Asian elephants have tusks.可知,亚洲象只有雄性象有象牙,雌性亚洲象没有象牙。故选C。【小题2】段落大意题。根据第二段第一句话African elephants have very useful trunks!及对...
Teeth and TusksElephants have four teeth and two tusks.The tusks come out of their mouths. These tusksgrow about seven inches a year, and they cangrow up to twenty feet long! The tusks are madeof ivory that is very valuable. The four teeth aremolars(白齿). About every four years, ...
These "unicorns of the sea" are actually whales with a long, spiralling tooth sticking out from their upper lip. Since most male narwhals have these tusks and most females do not, some scientists think that the tusk evolution is a case of sexual selection. Longer tusks usually also...
Do female dugongs have tusks? Unlike other mammalian species, the study of dugong teeth is not well-established. Thedugong possesses a pair of tusks, formed by the first upper incisor teeth in both males and females, that are used as cutting instruments for foraging3. Do dugongs live in t...
They bury(埋葬)the elephant in the ground with their tusks(獠牙).They usually don't leave that place for three days.When elephants travel,they always stop when they come to the place where a friend is under the ground.Elephants have great memories!
They bury (埋葬) the elephant in the ground with their tusks (獠牙). They usually don't leave that place for three days. When elephants travel, they always stop when they come to the place where a friend is under the ground. Elephants have great memories! 1. 1)请根据首字母提示补全①...
Did you like this post? If so, you might enjoy these other articles from the Sporcle Blog: Do Fish Make Sounds? The Origin of Dogs Why Do Elephants Have Tusks? Or, you can test your moon knowledge with some funanimal quizzeson Sporcle, like the one below! Comments comments...
They bury (埋葬) the elephant in the ground with their tusks (长牙). They usually don’t leave that place for three days. When elephants travel, they always stop when they come to the place where a friend is under the ground. Elephants have great memories! Task 1: Please complete the ...
Do you see elephants with your own eyes? Do you know about elephants? Elephants are very big and strong. 1 They are usually gray. They have long trunks (象鼻) and tusks (象牙). 2 They have poor eyesight (视力), but very good hearing. Elephants are very friendly to each other and...
But only male Indian elephants have tusks. The elephant lives mostly on grass, leaves and fruits. It has been easy for men to train elephants. They are used to carry heavy things for us. Elephants can live for about fifty years or more. 1. Elephants are ___ . A. not found in the...