Question

阅读理解

　　Every living thing has a physical boundary(分界线) that separated it from its external environment. Beginning with the bacteria and the simple cell and ending with man, every organism has a certain limit which marks where it begins and ends.

　　Anyone who has had experience with dogs, particularly in the countryside such as on farms, is familiar with the way in which the dog handles space. In the first place, the dog knows the limits of his aster's yard and will defend it against encroachment. There are also certain places where he steeps: a spot next to the fireplace, a spot in the kitchen, or one in the dinning room if he is allowed there. In short a dog has fixed points to which he returns time after time depending upon the occasion. One can also observe that the dog creates zone he is in, a trespasser(非法进入者) can cause different behaviours when he crosses the invisible lines which are meaningful to the dog.

　　This is particularly noticeable in females with pup-pies. A mother who has a new litter(一胎所生的小动物) in a little-used barn wall claim the barn as her territory. When the door opens she may make a slight movement or stir in one corner. Nothing else may happen as the intruder moves ten or fifteen feet into the barn. Then the dog may raise her head or get up circle about and lie down as another visible boundary is crossed. One can tell about where the line is by withdrawing and watching when her head goes down. As additional lines are crossed, there will be other signals, a thumping(重击) of the tail, a low moan or a growl. One can also observe comparable behavior in other vertebrates(脊椎动物)－fish, birds and mammals.

1．A dog on a farm knows ________.

[　　]

A．the size of its master's yard

B．the only fixed place where it should sleep

C．it should not sleep in the kitchen

D．the area that it should defend

2．A female dog with puppies will probably ________.

[　　]

A．attack any stranger who comes near

B．signal differently according to different occasions

C．raise her head at the sight of a stranger

D．growl when a stranger leaves her territory

3．It can be inferred from the third paragraph that mother dogs ________.

[　　]

A．have a sense of gradual territory

B．protect their babies cautiously

C．are ready to attack strangers

D．prefer to raise babies in barns

4．In the second paragraph, the underlined word “encroachment” probably means ________.

[　　]

A．aggression

B．attack

C．aggressors

D．trespasser

5．Which of the following is FALSE according to the passage?

[　　]

A．Dogs sleep at certain places in the yard or house.

B．logs will respond to territory trespasser.

C．The boundary lines are visible and meaningful to dogs.

D．Fish, birds belong to vertebrates.

Answer 1

答案：D;B;A;A;C
解析：