Finally, lacking information about the selling condition of its competitors, I have good reason to doubt whether customers have already refused to buy shampoo produced by those companies, a reason leading to a sharp decrease in their revenues. Consequently, it is imprudent for the president to preclude the need of replacing the HR 2 in shampoo with some alternatives. Unless the author could provide other evidence showing the business success of its competitors which produce shampoo with more HR2, any prediction about the stable sale of such shampoo would be dubious at best.
In sum, the argument is logically flawed and therefore unwarranted as it stands. To bolster it, the author should provide better evidence that (1) those customers who did not complain about the shampoo are actually satisfied with it; (2) 500 subjects are not enough for a study to draw a reliable conclusion about the negative effect of HR2 (3) the competitors producing shampoo with more HR2 have stable or increased sale revenue.
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