Gmat考試中，邏輯-評(píng)估題是常見的一種題型，寧波環(huán)球教育陳如成老師教大家一種攻克此類題型的方法。

　　Evaluation questions

　　步驟1：如識(shí)別原始答案是正面強(qiáng)化題干里的邏輯關(guān)系的

　　步驟2：且，否定原始答案 not it 將削弱原文主干邏輯

　　理論：也就是 正確答案不管是否正面強(qiáng)化且同時(shí)否定都能做到評(píng)估邏輯成立的與否

　　例題如下：

　　1.E monkeys in Rome often rub a certain type of worm into their fur. Secretions of these worms have been shown to contain two chemicals that are potent bee repellents, and bees carry parasites that debilitate the Es. The rubbing behavior is rare except during the rainy season, when bee populations are at their peak. Therefore, the monkeys probably rub the worms into their fur because doing so helps protect them against bees.

　　Which of the following would it be most useful to determine in order to evaluate the argument?

　　A.whether the two chemicals provide any protection for the worms against their own predators.

　　B.Whether the type of worm used by the E monkeys in Rome is found in other parts of the world.

　　C.Whether animals other than Es rub insects of any kind into their fur.

　　D.Whether the only time the worms are readily available to the Es is during the rainy season.

　　E.Whether secretions of any other insects accessible to the Es contain chemicals that repel bees.

　　主干邏輯鏈：E猴子常常撓一種蠕蟲 - 而這種蟲子的分泌物包含2種化學(xué)物質(zhì)（可以抵制蜜蜂- 而這種蜜蜂附帶寄生蟲對(duì)E猴子有害 ）——條件1：前面兩橫邏輯鏈簡(jiǎn)單總結(jié)為E猴子可以通過撓這種蠕蟲抵抗蜜蜂附帶的有害寄生蟲；條件2：這種撓的行為是很罕見的除了再雨季時(shí) 而這時(shí)蜜蜂數(shù)量也是在高峰期

　　結(jié)論：E猴子為了保護(hù)他們抵抗蜜蜂，才很有可能才有這樣的習(xí)慣。

　　條件1+條件2=結(jié)論

　　答案D：對(duì)D進(jìn)行步驟1，僅僅在雨季他們可以接觸到這些蠕蟲，可以讓他們很好的抵御蜜蜂，加強(qiáng)了文章的結(jié)論。對(duì)D進(jìn)行步驟2否定答案，說明除了雨季其他季節(jié)也可以有這樣的行為，所以雨季時(shí)的這種習(xí)慣也不一定是防止寄生蟲的=理解為蠕蟲的作用不一定是抵抗蜜蜂寄生蟲的

　　那么也到了評(píng)估題目邏輯鏈的：加強(qiáng)或削弱結(jié)論成立性。