更多"They have developed techniques whic"的相关试题:
[单项选择]Two main techniques have been used for training elephants, which we may call respectively the tough and the gentle. The former method simply consists of setting an elephant to work and beating him until he does what is expected. Apart from any moral considerations this is a stupid method of training, for it produces a resentful animal who at a later stage may well turn man-killer. The gentle method requires more patience in the early stages, but produces a cheerful, good-tempered elephant who will give many years of loyal service.
The first essential in elephant training is to assign to the animal a single mahout who will be entirely responsible for the job. Elephants like to have one master just as dogs do, and are capable of a considerable degree of personal affection. There are even stories of half-trained elephant calves who have refused to feed and pained to death when by some unavoidable circumstance they have been deprived of their own trainer. Such extreme cases must proba
A. the mahout is a responsible person
B. elephant calves don’t refuse to feed
C. the mahout and the elephant get on well together
D. several trainers are assigned to the job
[简答题]Which province is the most highly developed part of Canada
[单项选择]Why have the Americans developed space shuttle according to the passage
Which of the following statements is NOT true according to the passage
A. The term "averted vision" refers to the act of looking out of the comers of one’s eyes.
B. If you want to see very faint things, you should better look sideways rather than straight on.
C. The receptors located in the eye’s center are less sensitive to dim light.
D. To "look" is to see something straight ahead.
[单项选择]The old lady has developed a （） cough which cannot be cured completely in as hort time.
A. perpetual
B. permanent
C. chronic
D. sustained
[单项选择]The fish that have developed long feelers use them to ______.
A. recognize food particles
B. collect food
C. locate food by sense of smell
D. both A and B
[单项选择]In the past ten years skyscrapers have developed （ ） in Chicago and New York City.
A. homogeneously
B. simultaneously
C. spontaneously
D. harmoniously
[单项选择]The Eskimos have developed a capacity to live peacefully with one another. They have not had a strict system of landownership, one of the universal causes of conflict. They have evolved a system of food-sharing among families that makes the preservation of life possible. The absolute necessity of creating this safeguard against starvation has strengthened bonds between neighbors. Almost every traveler has noted the Eskimos’ friendliness and good humor toward strangers and among themselves. In a country where agriculture is impossible they have been forced to spend their energies in food-gathering rather than warfare. If one family disagreed with another, the usual solution was for that family to pick up its few possessions and go elsewhere. In the vast unused land, moving presented almost no problem.
The practice of infanticide, and suicide among the old people, seems to have been a factor of survival in times of food scarcity. The size of the family was controlled to some extent
A. the Eskimo fathers play the role of breadwinner
B. the Eskimo children are not cherished by their parents
C. when the Eskimos grow old, they usually kill themselves
D. the Eskimos will retain their way of life
