OG11-117

angelhuqi

Caterpillars of all species produce an identical hormone called "juvenile hormone" that maintains feeding behavior. Only when a caterpillar has grown to the right size for pupation to take place does a special enzyme halt the production of juvenile hormone. This enzyme can be synthesized and will, on being ingested by immature caterpillars, kill them by stopping them from feeding.

Which of the following, if true, most strongly supports the view that it would NOT be advisable to try to eradicate agricultural pests that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?

Most species of caterpillar are subject to some natural predation.

Many agricultural pests do not go through a caterpillar stage.

(C)         Many agriculturally beneficial insects go through a caterpillar stage.

(D)         Since caterpillars of different species emerge at different times, several sprayings would be necessary.

(E)          Although the enzyme has been synthesized in the laboratory, no large-scale production facilities exist as yet.

我虽然做对了这道题,但是我无法归纳出这是什么题型,然后该用什么方法去做,

gonghao

 most strongly supports the view that it would NOT be advisable to try to eradicate agricultural pests that go through a caterpillar stage by spraying croplands with the enzyme mentioned above?

angelhuqi

如上所说, 那么提干只是阐述了背景资料, 结论是问题中的NOT be advisable to .......

而原因就是要找的答案,对吗?

gonghao

是的要你support的结论已经明确的告诉你了

你去找一个能支持它的选型就好了

emma姐姐

我有一个问题: 题干只说enzyme可以kill caterpillars,并没有说对益虫有伤害啊??

凭什么OG认为用了enzyme就可能伤害beneficial insects呢?

请NN指教~ thx~

impersom

C说的就是益虫的成长也经过毛虫期，既然那种酶可以杀死毛虫，那么它也伤害了益虫。因此对农业生产有害不应该使用。

lsw

http://forum.chasedream.com/dispbbs.asp?boardid=24&replyid=1167443&id=14506&page=1&skin=0&Star=1

zhiyinfeifei

3x

cyc3033

这题有点怪

cyc3033

这题怪啊！