请教一道 CR 的题目 prep 上面的

漫漫在哪里

请教一道Prep上面的CR 的题目， 还有请问哪里有prep答案详解版？ 不甚感激啊！！！
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 该选项不正确的原因不知道是不是因为 although the number of plants grown per acre 几乎为一开始的两倍，但是由于 per plant yields lower than before, 所以最终的profits will not 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

cdwayne

答案是(A)，注意原文說Corn planted this closely will produce lower yields per plant.但是結果卻the new machine will allow corn growers to double their profits per acre.   yield少profit高的其中一個可能原因就是成本壓低了。

(D)你說得對，double 是 double了，但是yield降低所以無法保證profit高。