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2022-02-02 14:03:03|已瀏覽:94次
GMAT中數(shù)量的范圍是邏輯題?,特別是MUST BE問題,混淆答案也常來于此。下面一題來源是LSAT,先討論,后再公布答案及解釋。
The importance of the ozone layer to terrestrial animals is that it entirely filters out some wavelengths of light but lets others through. Holes in the ozone layer and the dangers associated with these holes are well documented. However, one danger that has not been given sufficient attention is that these holes could lead to severe eye damage for animals of many species.B). Few species of animals live on a part of the earth\'s surface that is not threatened by holes in the ozone layer錯(cuò)的原因:原文只說有HOLE可能會(huì)使很多動(dòng)物受傷害,從這點(diǎn)也許可以推出有動(dòng)物生活在受HOLE威脅的地方,但原文沒說有沒有動(dòng)物生活在不受HOLE威脅的地方,故錯(cuò)。
C). Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight錯(cuò)的原因:有些人容易選這個(gè),因?yàn)樵淖詈笠痪湓捳fHOLE會(huì)傷害很多動(dòng)物的眼睛,就是說很多動(dòng)物的眼睛會(huì)受傷害,既然有很多的眼睛受傷害,就有不受傷害的。錯(cuò)。關(guān)鍵是理解原文最后一句話的many。其實(shí)相當(dāng)于some ,表達(dá)的是有的概念,就是可以是1-100。相對(duì)或取非的概念為NONE。就是說它們可以包括全部100。所以有可能全部動(dòng)物眼睛都會(huì)受HOLE傷害。即C可能對(duì),也可能不對(duì),不是MUST BE TRUE。故錯(cuò)。我覺得這里不是some的原因,而是全文說could lead to severe eye damage for animals of many species.,由于是答案被原文支持,所以答案一定不能超越原文的界限,因?yàn)樵臑閲?yán)重傷害很多種類的眼睛,我們只能得到。河行┓N類的眼睛沒有被嚴(yán)重的傷害 可以做絕對(duì)正確的推論,但是說有些種類的眼睛根本沒有被傷害 就不能是mustberight的選項(xiàng)了。所以該選項(xiàng)不能成為正確選項(xiàng)。
D). A single wavelength of sunlight can cause severe damage to the eyes of most species of animals錯(cuò)的原因:也是容易選錯(cuò),因?yàn)樵牡淖詈笠痪湓捈由现形膶?duì)MANY和 MOST(都是很多)的理解。其實(shí)MOST(多數(shù))是指51-100。MANY指1-100。所以不能從MANY推出MOST,從MOST倒可以推出MANY。即原文用MOST,D選項(xiàng)用MANY,則為答案。
E). Some wavelengths of sunlight that cause eye damage are more likely to reach the earth\'s surface where there are holes in the ozone layer than where there are not, 從原文最后兩句話可知完好的臭氧層濾掉了部分有害的光線,則說明有洞時(shí),有害的光線更易到達(dá)地球。故對(duì)。
最后強(qiáng)調(diào)一點(diǎn)該問題雖然是MOST STRONGLY SUPPORTED,但不會(huì)出現(xiàn)兩個(gè)能從原文MUST BE得出的答案,因?yàn)樵擃}歸為MUST BE TRUE題型,當(dāng)然不存在支持的程度問題。
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