下图中,位于南半球、西半球、高纬度有极昼极夜现象的是 答案:CFarming was once the chief way of life in
nearly every country. People cannot live without food, and nearly all their
food comes from crops and animals raised on farms. Not many people farm for a
living any more, but farming remains the most important work in the world.
Before the nineteenth century, the
typical American family lived on a small farm. They raised pigs, cattle, sheep,
chickens, and planted corn, fruits, garden vegetables, and wheat. Everyone
worked long and hard, but the results were often poor. Families barely
harvested enough food for themselves. This situation began to change during the
last half of the 1800's and it changed remarkably(明显地) in the next century.
Scientific methods
and labor-saving machinery have made farming increasingly productive. The
development of improved plant varieties and fertilizers has helped double and
even triple the production of some major crops. More scientific animal care and
animal raising have helped increase the amount of meat and products that
animals produce. At the same time, the use of tractors and other modern farm
equipment has sharply reduced the need for farm labor.
As farming has
become less important as a way of life in the United States, it has become more
important as a source which offers materials to industry. Today's successful
farmers are experts not just in agriculture but also in accounting, marketing,
and finance. Farms that are not run in a similar way have great difficulty
surviving.
1. We are
told in the first paragraph about ____.
A. the history of
farming
B. the importance of farming
C. the development of
farming
D. the changes of farming
2. Which
of the following describes American farming before the 19th century?
A. Farmers didn’t work hard on their
farms.
B. Farmers used tractors to help them.
C. Farming was the main way of living for
most people.
D. Farmers could supply materials to
industry.
3. Crop
production has increased greatly now thanks to all the following EXCEPT __.
A. scientific
methods
B. labor- saving machinery
C. farmers’ hard
work
D. chemical fertilizers
4. The
passage mainly talks about_____.
A. the advantages of American
farming
B. the changes in American farming
C. the situation of American
farms
D. how rapidly farming has developed