题目内容
Modern man has cleared the forests for farmland and for wood, and has also carelessly burned them. More than that,
though, he has also interfered （干涉） with the invisible bonds between the living things in the forests. There are many examples of this kind of destruction. The harmfulness of man’s interference can be seen in what happened many years ago in the forest of the Kaibab plateau （凯亚巴布高原） of northern Arizona. Man tried to improve on the natural web of forest life and destroyed it instead.
The Kaibab had a storybook forest of large sized pine, Douglas fir, white fir, blue and Engelmann spruce. In 1882 a visitor noted, "We, who ... have wandered through its forests and parks, have come to regard it as the most enchanting region it has ever been our privilege （特权） to visit.”This was also the living place of the Rocky Mountain mule deer. Indians hunted there every autumn to gather meat and skins. The forest also had mountain lions, timber wolves and bobcats that kept the deer from multiplying too rapidly.
Then, in 1906, President Theodore Roosevelt made the Kaibab a national game preserve. Deer hunting was forbidden. Government hunters started killing off the deer’s enemies. In 25 years’ time, 6,250 mountain lions, wolves and bobcats were killed. Before the program, there were about 4,000 deer in the Kaibab, by 1924, there were about 100,000.
The deer ate every leaf and twig they could reach. But there was not nearly enough food. Hunting of deer was permitted again. This caused a slight decrease in the deer herd （鹿群），but a far greater loss resulted from starvation （饥饿） and disease. Some 60 percent of the deer herd died in two winters. By 1930 the herd had dropped to 20,000 animals. By 1942 it was down to 8,000.
1． The destruction of the environment of the Kaibab resulted from .
A. turning the forest into cultivated land
B. interfering with natural cycle of forest life
C. forest fires caused by man’s carelessness
D. cutting the trees for building materials
2．"Engelmann spruce"（Para. 2） is most likely the name of .
A.a tree B.an animal C.a mountain D.a game
3．The number of the deer in the Kaibab had increased enormously in years’ time.
A.25 B.6 C.18 D.12
4． Years later, large numbers of deer in the Kaibab died mainly because of .
A. the cold B.the organized kill
C.the shortage of food D.the poor management
BACC
53随堂测系列答案Through history, children have played with toys and they help to prepare children for adult life. But the toys are changing all the time. As science and technology have changed the way adults live, the toys children play with have changed as well. Developments in science and technology have had a big effect on the toys that children play with. Today trains and mobile phones are popular toys for young children, but there were no toys of this kind before real trains and mobile phones were invented. The materials that toys are made of have also changed. Today lots of toys are made of plastic. Plastic is a modern, man-made material that did not exist (存在) in the past. On the other hand, some other toys that you have might not be all that different from the ones children played with 1,000 years ago. Scientists have found some bone dice (骰子)in Aberdeen. In medieval (中世纪的)times dice were used for playing games as much as they are today.
A recent survey found that half of all the children aged from 4 to 6 have played video games, a quarter of them regularly. The increasing use of electronic toys troubles Dr Singer, a professor at Yale. “One thing we know is that kids in early years need to be in touch with the real world,” he said, “No matter how brilliant they are, they’re not going to learn to walk, to move or to talk to others unless their hands or feet have a direct role in such activities.”
Some toy experts argue that the best toys are the ones that increase a child’s creativity and imagination. Traditional toys can be used for different kinds of purposes and be used in group settings, individually(单独地), and one-to-one. They are also used differently depending on the child’s age and skill level. And these toys made of natural materials are valuable for children because they teach children what the world is made of.
【小题1】In how many ways do toys change according to the first paragraph?
| A．One. | B．Two. | C．Three. | D． Four. |
| A．only children like to play with toys |
| B．toys have nothing to do with children’s future life |
| C．the development of toys is related to science and technology |
| D．plastic is the best material for making toys |
| A．the electronic toys are good for children if they play often enough |
| B．the electronic toys prevent children keeping in touch with the real world |
| C．children should be stopped from being hurt by the danger coming from the outside world |
| D．children should play with electronic toys instead of the traditional ones |