注意:此部分试题请在答题卡1上作答。
Many college students today own personal computers that cost anywhere from $1000 toperhaps $5000 or more. __26__, it is not uncommon for them to purchase __27__ costinganother several hundred dollars. Twenty years ago, computers were __28__, but they werevery large and extremely expensive. Few, if any. __29__ purchased computers for home use.Over the years, the price of the guts of a computer-its memory-has declined to less than athousandth of the price per unit of memory that prevailed twenty years ago. This is the mainreason why computers cost so much less today than they used to. Moreover. __30__improvements have made it possible to __31__ memory circuitry that is small enough to fit intothe portable personal computers that many of us own and use. __32__, as the price ofcomputation has declined the average consumer and business have spent more onpurchasing computers.
__33__ improved agricultural technology, hybrid(杂交) seeds. __34__ animal breeding, and soon have vastly increased the amount of output a typical farmer can produce. The prices ofgoods such as meats and grains have fallen sharply relative to the prices of most other goodsand services. As agricultural prices have fallen, many households have decreased their totalexpenses on food. Even though the __35__ of a product purchased generally increases whenits price falls, total expenses on it may decline.
【2013年12月大学英语四级听力真题第2套+答案+原文+评析】相关文章:
最新
2017-01-16
2016-10-21
2016-10-08
2016-10-08
2016-10-08
2016-10-08