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题库 / Prep2007E2-CR-4
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 __________.
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
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
with the larger number of plants growing per acre, more fertilizer will be required
with the spacing between rows cut by half, the number of plants grown per acre will almost double
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
【个人见解】看了评论，感觉D选项的错误和almost关系不大。
题干里面说了Corn planted this closely will produce lower yields per plant.
即：以15inches种玉米以后【每株的产量】（yields）下降；
D选项：以15inches种玉米后每英亩【玉米的株数】涨了几乎两倍；
总产量=每株产量×株数，前者下降后者上升，无法判断总产量，即无法断言profit的涨跌。
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