[問題]大全20-06

[Ace]

Potato cyst nematodes are a pest of potato crops. The nematodes can lie dormant for several years in their cysts, which are protective capsules, and do not emerge except in the presence of chemicals emitted by potato roots. A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.

Which of the following, if true, best supports the claim that the company’s plan will be successful?

(A) Nematodes that have emerged from their cysts can be killed by ordinary pesticides.
(B) The only part of a potato plant that a nematode eats is the roots.
(C) Some bacteria commonly present in the roots of potatoes digest the chemicals that cause the nematodes to emerge from their cysts.
(D) Trials have shown that spreading even minute quantities of the chemicals on potato fields caused nine-tenths of the nematodes present to emerge from their cysts.
(E) The chemicals that cause the nematodes to emerge from their cysts are not emitted all the time the potato plant is growing.

answer D

我的疑問在於D為什麼可以support
因為D的效果不是已經被題幹證實了嗎
再重複說一次chemical的作用豈不是多此一舉
更何況D也沒有因果關係告知害蟲會因此而餓死

相形之下 B可能還比較有說服力
起碼他說明害蟲只吃馬鈴薯的根
即使題目未說明是否害蟲的食物來源只能靠馬鈴薯的根
但起碼也有讓食物來源減少造成害蟲餓肚子的效果

請各位大牛指點迷津~~~

[維尼]

個人覺得B是 無關選項
no potato are planted...
那有沒有根似乎是沒差別

而D相對來說是support
證明十分之九都有效唷

[吳]

support方法有兩種
一種提供新資訊去support
一種將題目換句話說=>這是比較弱的support

Q農藥灑在根上跟D蟲只吃根
根本是兩個無關的事情,沒法support

[Ace]

我同意換句話說的support以及維尼牛的有效性觀點
可是D選項只能推得結論--化學藥劑會使得許多D蟲會孵化
但是嚴謹的來說,孵化不等於會soon starve to death
要把化學藥劑和餓死作為因果關係
勢必需要架一座橋 那就是D蟲以POTATO為主食 or 其他關於跟D蟲飲食有關的論點
B選項就有那麼點意味.....

[吳]

N是馬鈴薯的害蟲
N在cyst中可呆上數年,除非chemical灑在根上才會從cyst中出來
有家公司已經發現相關的chemical,並計畫買給農夫
N從cyst出來會餓死

問題:公司的計畫會成功?

D實驗證明the chemical會讓N從cyst出來=>N從cyst出來會餓死=>計畫會成功
B蟲只吃根=>跟此公司發明的chemical有什麼關係呢?

[Ace]

N是馬鈴薯的害蟲
N在cyst中可呆上數年,除非chemical灑在根上才會從cyst中出來
有家公司已經發現相關的chemical,並計畫買給農夫
N從cyst出來會餓死

問題:公司的計畫會成功?

D實驗證明the chemical會讓N從cyst出來=>N從cyst出來會餓死=>計畫會成功
B蟲只吃根=>跟此公司發明的chemical有什麼關係呢?

從cyst出來=>N從cyst出來會餓死=>計畫會成功
我還是覺得這是過度推論 因為沒有資訊告知N吃POTATO
小鑽牛角尖一下 假若N吃地上的微生物也可勉強維持生計
那個就可以weaken

B蟲只吃根=>跟此公司發明的chemical有什麼關係呢?
我們可從文章中了解chemical的作用不是在殺蟲
就是因為不能殺蟲 所以要借刀殺人
B就提供了小刀

[吳]

題目
Potato cyst nematodes are a pest of potato crops. The nematodes can lie dormant for several years in their cysts, which are protective capsules, and do not emerge except in the presence of chemicals emitted by potato roots. A company that has identified the relevant chemicals is planning to market them to potato farmers to spread on their fields when no potatoes are planted; any nematodes that emerge will soon starve to death.

是題目說的,不是我推論的喔

我們可從文章中了解chemical的作用不是在殺蟲
就是因為不能殺蟲 所以要借刀殺人
B就提供了小刀

chemical的作用只要逼出蟲子就好了ㄚ=>等同殺蟲
因為nematodes that emerge will soon starve to death
(請把這句話當成fact)

B無關選項,原文根本沒有提到任何跟蟲吃根有關的資訊
蟲只吃根=>減少食物來源這個化學藥品會成功
who told?原文沒有這個資訊~!




是小李飛刀嗎.....真是好快的刀... :)