根据短文内容，判断正(T)误(F)。

     Many of us like animals, sometimes we go to the zoo to see the animals. It makes us happy. And

some people often think they can teach the animals to work for them. In our life we may see elephants,

dogs, monkeys and some other animals doing a lot of things. For people, elephants can carry things

and dogs can look after houses. And people can also teach the animals to work in the factory. Now

people are trying to get animals to do many other things.

( )1. All of us like animals very much.

( )2. Elephants can do some heavy work for us.

( )3. Monkeys can help us look after houses.

( )4. People can teach some animals to work in the factory.

( )5.Animals are trying to do some other things.

在远达片后前立位上，正常情况下左心缘看不到（）。

A.主动脉结

B.肺动脉段

C.左心耳

D.右心室

E.左心室