數(shù)量的范圍是邏輯題?？?，特別是MUST BE問(wèn)題，混淆答案也常來(lái)于此。下面一題是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.

Which one of the following is most strongly supported by the statements above, if they are true.

A). All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.

B). Few species of animals live on a part of the earth\'s surface that is not threatened by holes in the ozone layer

C). Some species of animals have eyes that will not suffer any damage when exposed to unfiltered sunlight

D). A single wavelength of sunlight can cause severe damage to the eyes of most species of animals

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,

分析部分：

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.

Which one of the following is most strongly supported by the statements above, if they are true.

A). All wavelengths of sunlight that can cause eye damage are filtered out by the ozone layer where it is intact.錯(cuò)的原因：All wavelengths 太strong。原文只知完好的臭氧層濾掉一部分光，讓一部分通過(guò)，并說(shuō)通過(guò)的那部分對(duì)很多動(dòng)物有害。從這點(diǎn)很容易誤認(rèn)有害的都給濾掉了。其實(shí)原文沒(méi)說(shuō)是 否那通過(guò)的一部分是否含有有害波長(zhǎng)。所以錯(cuò)。

原文問(wèn)：is most strongly supported by the statements above，如果問(wèn)哪個(gè)選項(xiàng)support 結(jié)論。A應(yīng)該是個(gè)好選項(xiàng)。非常strong!但是因?yàn)槭潜辉闹С郑x項(xiàng)不能超越原文提供的范圍：some wavelengths 不能推出all wavelengths，所以A錯(cuò)了。

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(shuō)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(méi)說(shuō)有沒(méi)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f(shuō)HOLE會(huì)傷害很多動(dòng)物的眼睛，就是說(shuō)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(shuō)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(jué)得這里不是some的原因，而是全文說(shuō)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(méi)有被嚴(yán) 重的傷害　可以做絕對(duì)正確的推論，但是說(shuō)有些種類的眼睛根本沒(méi)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(shuō)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(wèn)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(wèn)題。