请教LSAT19-II-21，22 （21是否答案有误）
21. Several years ago, as a measure to reduce the population of gypsy moths, which depend on oak leaves for food, entomologists introduced into many oak forests a species of fungus that is poisonous to gypsy moth caterpillars. Since then the population of both caterpillars and adult moths has significantly declined in those areas. Entomologists have concluded that the decline is attributable to the presence of the poisonous fungus.
Which one of the following. If true most strongly supports the conclusion drawn by the entomologists?
(A) A strain of gypsy moth whose caterpillars are unaffected by the fungus has increased its share of the total gypsy moth population
(B) The fungus that was introduced to control the gypsy moth population is poisonous to few insect species other than the gypsy moth
(C) An increase in number of both gypsy moth caterpillars and gypsy moth adults followed a drop in the number of some of the species that prey on the moths.
(D) In the past several years, air pollution and acid rain have been responsible for a substantial decline in oak tree populations.
(E) The current decline in the gypsy moth population in forests where the fungus was introduced is no greater than a decline that occurred concurrently in other forests.
Ans: A
I guess answer is wrong.
A,C,E are all weaken.and D is irrelevant.I choose B.
22. Director of personnel: Ms. Tours has formally requested a salary adjustment on the grounds that she was denied merit raises to which she was entitled. Since such grounds provide a possible basis for adjustments, an official response is required. Ms. Tours presents compelling evidence that her job performance has been both excellent in itself and markedly superior to that of others in her department who were awarded merit raises. Her complaint that she was treated unfairly thus appears justified. Nevertheless her request should be denied. To raise Ms. Tours's salary because of her complaint would jeopardize the integrity of the firm's merit-based reward system by sending the message that employees can get their salaries raised if they just complain enough.
The personnel director's reasoning is most vulnerable to criticism on the grounds that it
(A) fails to consider the possibility that Ms. Taurus's complaint could be handled on an unofficial basis
(B) attempts to undermine the persuasiveness of Ms. Taurus's evidence by characterizing it as "mere complaining"
(C) sidesteps the issue of whether superior job performance is a suitable basis for awarding salary increases
(D) ignores the possibility that some of the people who did receive merit increases were not entitled to them
(E) overlooks the implications for the integrity of the firm's merit-based reward system of denying Ms. Tours's request
Ans: E , I choose C ,
And what does E mean? |
