OG 17 CR 題號 550

550. Snowmaking

machines work by spraying a mist that freezes immediately on contact with cold

air. Because the sudden freezing kills bacteria, QuickFreeze is planning to

market a wastewater purification system that works on the same principle. The

process works only when temperatures are cold, however, so municipalities using

it will still need to maintain a conventional system.

Which

of the following, if true, provides the strongest grounds for a prediction that

municipalities will buy QuickFreezes purification system despite the need to

maintain a conventional purification system as well?

A Bacteria are not the only impurities that

must be removed from wastewater.

B Many municipalities have old wastewater

purification systems that need to be replaced.

C Conventional wastewater purification systems

have not been fully successful in killing bacteria at cold temperatures.

D During times of warm weather, when it is not

in use, QuickFreezes purification system requires relatively little

maintenance.

E Places where the winters are cold rarely

have a problem of water shortage.

考點：二者因果 增強

有個低溫殺菌消毒原理，然後QF公司的凈水系統是基於同樣的原理，同時考慮到該系統只能在低溫環境下工作，所以市政部門仍然需要維持現有的傳統凈水系統。

問：現在哪個可以增強政府會買QF的凈水系統，即使有需要維持現有的傳統凈水系統

邏輯鏈： cause: QF低溫工作殺菌，市政部門現在還有conventional system

effect: 買 QF 的凈水器

A:

Bacteria are not the only impurities 細菌不是唯一的雜質 無關

B:

old wastewater purification systems that need to be replaced舊的要換 要換，就非要換QF的嗎，是親戚嗎，非得買

無關

C:

Conventional wastewater purification systems have not been fully successful in

killing bacteria at cold temperatures常規的在低溫的時候殺不了菌 自然需要買QF的，他因增強

D.

During times of warm weather, when it is not in use， QuickFreezes

purification system requires relatively little maintenance 迷惑選項，萬一常規的還不要維修費呢，無關，影響不了結論

E：water shortage 水短缺的問題，管凈水設備屁事

無關

推薦閱讀：