Most of us have seen a dog staring at,
sometimes snarling at, and approaching a reflection of itself. For most animals,
seeing their own image in a mirror acts as a social stimulus. But does the dog
recognize itself, or does the reflection simply signal a potential companion or
threat This question is interesting for a number of masons. Apart from
curiosity about the level of animals’ understanding, research on serf-
recognition in animals has several benefits. It provides some insight into the
evolutionary significance of this skill of serf-recognition and into the level
and kinds of cognitive competence that the skill requires. Such research also
indicates the kinds of learning experiences that determine the development of
self-recognition. In addition, work with animals fosters the use of techniques
that are not dependent on verbal re
A. whether dogs recognize themselves in mirrors
B. whether the grooming practices of chimps can be altered
C. whether nonhumans have a serf-concept
D. what her chimps change their behavior when a mirror is present
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[单项选择] Text 4
Most of us have seen a dog staring at,
sometimes snarling at, and approaching a reflection of itself. For most animals,
seeing their own image in a mirror acts as a social stimulus. But does the dog
recognize itself, or does the reflection simply signal a potential companion or
threat This question is interesting for a number of masons. Apart from
curiosity about the level of animals’ understanding, research on serf-
recognition in animals has several benefits. It provides some insight into the
evolutionary significance of this skill of serf-recognition and into the level
and kinds of cognitive competence that the skill requires. Such research also
indicates the kinds of learning experiences that determine the development of
self-recognition. In addition, work with animals fosters the use of techniques
that are not dependent on verbal re
A. nearly all animals have some self-concept
B. nearly all animals have no serf-concept
C. nearly all animals have an awareness of the uses of mirrors
D. nearly all animals have a fear of mirrors
[填空题]What do we know about sea Most of us have seen it. Many of us have swum in it. We know that it looks very pretty when the sun is shining on it. And we also know that the sea is full of waves. Waves are beautiful to look at, but they can (11) ships at sea, as well as houses and buildings near the shore. What causes waves Most waves are caused by winds blowing over the (12) of the water. The sun heats the earth, causing the air to rise and the winds to blow. The winds blow across the sea, pushing little waves into enormous ones. When the wind is blowing at 120 (13) per hour, most waves will be about 12 meters high. In 1933 the United States (14) the largest measured wave in history. It rose in the Pacific Ocean to a (15) of 34 meters.
[填空题]The past two decades have seen in the US an increase in the number of the newspapers but a decrease in their readership.
[单项选择]As we have seen, propaganda can appeal to us by arousing our emotions or（ ）our attention from the real issues at hand.
A. retaining
B. sustaining
C. distracting
D. obscuring
[单项选择]Most people have had a dog or wanted one as their companion at some time in their lives. If you are thinking of buying a dog, however, you should first decide what sort of companion you need and whether the dog is likely to be happy in your house. Specialists’ (专家) advice is useful to help you choose the most suitable kind of dog. But in part the decision depends on common sense.
Different dogs were developed to perform specific tasks. So, if you want a dog to protect you, or your house, for example, you should choose the one that has the right size and characteristics. You must also be ready to devote (投入) a great deal of time to training the dog when it is young and give it the exercise it needs throughout its life, unless you live in the countryside and can let it run freely.
Dogs are demanding pets. Cats love the house and so are satisfactory with their place where there is secure, but a dog is loyal to its master and consequently wants him to show proof of his aff
A. it must be trained so that it won’t bite
B. it demands more food and space
C. it needs more love and care
D. it must be looked after carefully
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