GWD 24-6

juliaPL

thanks

JerryGuan

(Line 14)Another example of indirect negative

说明有两种方式：E特指那种方式，言下之意只有一种方式；B说一种方式，言下之意，还有其他的方式。

故此选B。

fallqiuhb

5 Which of the following is mentioned in the passage as an indirect effect of using a biocontrol agent?

(A) Reduction of the commercial value of a desirable animal species

(B) An unintended proliferation of a nontarget animal species

(C) An unforeseen mutation in a target species

(D) Diminution of the positive effects conferred by a nontarget animal species

(E) Competition for resources with a largest species

看不懂为什么选D， 哪位大侠帮忙解释一下

[此贴子已经被作者于2005-4-6 13:47:11编辑过]

fallqiuhb

up

而今迈步从头越

原文：biocontrol agent might reduce the benefits conferred by a desirable animal species by consuming a plant on which the animal prefers to lay its eggs.

因为target animal species is unwanted species, so nontarget animal species is wanted/desirable

xinfaxian

以下是引用而今迈步从头越在2005-4-8 15:06:00的发言：

原文：biocontrol agent might reduce the benefits conferred by a desirable animal species by consuming a plant on which the animal prefers to lay its eggs.

因为target animal species is unwanted species, so nontarget animal species is wanted/desirable

精彩！

remona9t

不是特别同意15楼的引用，

这道提问的是Which of the following is mentioned in the passage as an indirect effect of using a biocontrol agent?

文章中说使用biocontrol agent会对untarget species通过两个方面造成负面的影响：1，竞争资源；2，间接的负面影响；所以这道题应该是在有间接的负面影响的例子里来寻找答案，而不是在竞争资源的例子里寻找答案；

可是这道题如果这样分析的话没有更好的答案。

不知道大家是怎么看的？

amacd

(E) the way in which indirect consequences from the use of biocontrol agents are most likely to occurs.

most likely - 太絕對了 The example is one of the consequences

深林芝兰

可是我没有选B是因为B说can affect a nontarget speciese,但是在原文明明提到了两个物种。

maggie1202

6.The example presented by the author in

lines 14-23 most clearly serves to illustrate

1. a situation in which a species is less

vulnerable to biocontrol agents than it

would have been to chemical pesticides.

2. a way in which the introduction of a bio-

control agent can affect a nontarget

species.

3. a nonnative agent’s adapting in an unpre-

dictable way that results in damage to a

new host.

我选C, 定位下文

"unlike a chemical pesticide, a biocontrol

agent may adapt in unpredictable ways.

(40) so that it can feed on or otherwise harm

new hosts."

欢迎NN排砖