Prep 2-4填空题 请教

qincong83

4.   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 __________.

 

(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

请问D错在哪里？谢谢！

crazecat123

因为D就算是个事实但不能说明和农民的利润有直接的关系。

auroral1982

是不是这样？
就算是可以种植玉米的地方多出来一倍，最后的产量也相应的多出来，但是还要减去相应减少了的产量，总量是不可能double的。
也就是，原来是a亩地，每亩产出x，最终为ax。
现在是，(a/2-因为close而lower了的产量）×2。最多持平吧。