Which of the following most logically completes the argument?
A new machine for harvesting corn will allow rows to be planted only fifteen inches apart, instead of the usual thirty inches.Corn planted this closely will produce lower yields per plant.Nevertheless, the new machine will allow corn growers to double their profits per acre because __________.
(A) with the closer spacing of the rows, the growing corn plants will quickly form a dense canopy of leaves, which will, by shading the ground, minimize the need for costly weed control and irrigation
(B) with the closer spacing of the rows, corn plants will be forced to grow taller because of increased competition for sunlight from neighboring corn plants
(C) with the larger number of plants growing per acre, more fertilizer will be required
(D) with the spacing between rows cut by half, the number of plants grown per acre will almost double
(E) with the closer spacing of the rows, the acreage on which corn is planted will be utilized much more intensively than it was
before, requiring more frequent fallow years in which corn fields are left unplanted
现在我是这样分析的，请看一下对吗？答案是A
Which of the following most logically completes the argument?
A new machine for harvesting corn will allow rows to be planted only fifteen inches apart, instead of the usual thirty inches.Corn planted this closely will produce lower yields per plant.Nevertheless, the new machine will allow corn growers to double their profits per acre because __________.
利润=收入-成本
(A) with the closer spacing of the rows, the growing corn plants will quickly form a dense canopy of leaves, which will, by shading the ground, minimize the need for costly weed control and irrigation减少成本能使利润上升。
(B) with the closer spacing of the rows, corn plants will be forced to grow taller because of increased competition for sunlight from neighboring corn plants长得高不一定产量高。不一定收入就能增加
(C) with the larger number of plants growing per acre, more fertilizer will be required成本上升削弱
(D) with the spacing between rows cut by half, the number of plants grown per acre will almost double这是题干的重复，没有意义，题里已经说了原来30现在只要15，那就是per acre要多一倍了
(E) with the closer spacing of the rows, the acreage on which corn is planted will be utilized much more intensively than it was before, requiring more frequent fallow years in which corn fields are left unplanted削弱 作者: gracezz 时间: 2010-4-26 16:05
我竟然选了B，大家快来拍我！作者: 北落狮门 时间: 2010-4-26 17:58
LZ分析很对，哪里不明白？作者: gracezz 时间: 2010-4-26 18:09
是我看了前人分晰后常见得思路应该是这样，我想让大家帮我看看这个思路对不~~现在明白了~~谢谢楼上~~：）