[单项选择]Over the past ten years, the sharp increase in the sale of personal computers was due to
A. better computer graphics and sound.
B. the enhanced version of the Pentium processor.
C. the success of the world’s first microprocessor.
D. successful sales of Intel chips and Microsoft softwar

[简答题]Increasingly over the past ten years, people—especially young people—have become aware of the need to change their eating habits because much of the food they eat, particularly processed food, is not good for the health. Consequently, there has been a growing interest in natural foods: foods which do not contain chemical additives and which have not been affected by chemical fertilizers widely used in farming today.
Natural foods, for example, are vegetables, fruit and grain which have been grown in soil that is rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount—but not the quality—of foods grown in commercial farming areas.
Natural foods also include animals which have been allowed to feed and move freely in healthy pas

[单项选择]Over the past ten years, natural gas production has remained steady, but ________ has risen steadily.
A. consumption
B. dissipation
C. disposal
D. expenditure

[单项选择]Increasingly, over the past ten years, people—especially young people—have become aware of the need to change their eating habit, because much of the food they eat, particularly processed foods, is not good for health. Consequently, there has been a growing interest in natural foods: foods which do not contain chemical additives and which have not been affected by chemical fertilizers, widely used in farming today.
Natural foods, for example, are vegetable, fruit and grain which have been grown in soil and are rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the amount— but not the quality—of foods grown in commercial fanning areas.
Natural foods also include animals which have been allowed to feed and move freely in healthy pa
A. has been nourished by fertilizers
B. contains vegetable matter that has not been consumed
C. has had chemicals and fertilizer added to it
D. contains large quantities of vitamins