prep2-11-Q38,没有人问，请NN帮忙

graceguo98

Question #38.  316-06    (23059-!-item-!-188;#058&000316-06)



The passage suggests that methiocarb and metaldehyde would be more effective as slug poisons if it were true that they



(A) disrupt the slug's digestive processes rather than its reproductive functions

（ 原文无）

(B) reduce the slug's ability to taste food

（some will stop feeding 可否理解为reduce the slug's ability to tast food? 为什么？）



(C) begin to affect the feeding behavior of a slug only after it has ingested a lethal dose

（为什么正确？）

原文出处"increasing the probability that some will stop feeding before receiving a lethal 致命的dose."

“interfere with the slugs' feeding behavior and limit their ingestion of the poison”

我就不明白怎么会是C正确？

(D) reach the central pattern generator more quickly 无

(E) accumulate only in the central pattern generator rather than throughout the brain

“that part of the brain charged with载 making the mouth move in a coordinated fashion--the "central pattern generator发电机"”可否理解为这种杀虫剂之作用在“the central patterns generator”

谢谢

sylviama

可能楼主和我犯了同样的错误，对原文理解有误。

原文首句：most farmers attempting to control slugs and snails... 说明Farmer的立场是为了控制slugs的数量。根据后文提到用poison控制的话，应该是为了减少slugs的量。

其次，第三句说：Thus, both neur*, while somewhat effective, interfere...说明both neur* are not effective! Because they 'increasing the probability that some will stop feeding before receiving a lethal dose.' 那么要使neur* effective, 取非，即C。