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It can be inferred from the passage that when aspen groves experience a “disturbance” (line 30), such a disturbance

以下是引用neverback在2004-12-17 15:00:00的发言：

Even more than mountainside slides of mud or snow, naturally occurring forest fires promote the survival of aspen trees. Aspens’ need for fire may seem illogical since aspens are particularly vulnerable to fires; whereas the bark of most trees consists of dead cells, the aspen’s bark is a living, functioning tissue that—along with the rest of the tree—succumbs quickly to fire.

The explanation is that each aspen, while appearing to exist separately as a single tree, is in fact only the stem or shoot of a far larger organism. A group of thousands of aspens can actually constitute a single organism, called a clone, that shares an interconnected root system and a unique set of genes. Thus, when one aspen—a single stem—dies, the entire clone is affected. While alive, a stem sends hormones into the root

system to suppress formation of further stems. But when the stem dies, its hormone signal also ceases. If a clone loses many stems simultaneously, the resulting hormonal imbalance triggers a huge increase in new, rapidly growing shoots that can outnumber the ones destroyed. An aspen grove needs to experience fire or some other disturbance regularly, or it will fail to regenerate and spread. Instead, coniferous trees will invade the aspen grove’s borders and increasingly block out sunlight needed by the aspens.(35)

Q37:The author of the passage refers to “the bark of most trees” (line 6) most likely in order to emphasize the

vulnerability of aspens to damage from fire when compared to other trees

rapidity with which trees other than aspens succumb to destruction by fire

relatively great degree of difficulty with which aspens catch on fire when compared to other trees

difference in appearance between the bark of aspens and that of other trees

benefits of fire to the survival of various types of trees

MINE C

ANS A

请指教

Aspens’ need for fire may seem illogical since aspens are particularly vulnerable to fires; whereas the bark of most trees consists of dead cells, the aspen’s bark is a living, functioning tissue that—along with the rest of the tree—succumbs quickly to fire.

Aspen 对火的需要似乎有问题，因为aspens are vulnerable to fires。然后他就解释了，大部分树的树皮都是死细胞，烧了也不怕，可是aspen 的树皮却是 a living, functioning tissue 并且和树的其他部分一起，一烧就死。

It can be inferred from the passage that when aspen groves experience a “disturbance” (line 30), such a disturbance

文章没有说a是生长在barren region。文章都是在说明火对a的生长有什么帮助。

以下是引用ziwingfong在2005-2-6 0:34:00的发言：

Q36:

It can be inferred from the passage that when aspen groves experience a “disturbance” (line 30), such a disturbance

leads to a hormonal imbalance within an aspen clone
provides soil conditions that are favorable for new shoots
thins out aspen groves that have become overly dense
suppresses the formation of too many new aspen stems
protects aspen groves by primarily destroying coniferous trees rather than aspens

我知道A是对的。为什么E会错呢？

谢谢

An aspen grove needs to experience fire or some other disturbance regularly, or it will fail to regenerate and spread. Instead, coniferous trees will invade the aspen grove’s borders and increasingly block out sunlight needed by the aspens

这里的disturbance和fire是对上面的总结。就是a要经历disturbance才生长的更好。下面的coniferous trees可以看作一种disturbance。但是文章没有对它进行分析，实际上作者想表明这个coniferous trees对a的生长是有益的。E的意思与之相反。

whereas the bark of most trees consists of dead cells, the aspen’s bark is a living, functioning tissue that—along with the rest of the tree—succumbs quickly to fire.

以下是引用autumn_leaves在2005-3-24 17:05:00的发言：

Q37我觉得是D

请看原文:

whereas the bark of most trees consists of dead cells, the aspen’s bark is a living, functioning tissue that—along with the rest of the tree—succumbs quickly to fire.

选项:

rapidity with which trees other than aspens succumb to destruction by fire

这不是在说烧毁的速度么?而不是vulnerability

也就是说作者写这段话希望强调的东西，显然不是trees other than aspens，作者希望表达的是aspens的特点，因此b错。

forest fires promote the survival of aspen trees. Aspens’ need for fire may seem illogical since aspens are particularly vulnerable to fires; whereas the bark of most trees consists of dead cells, the aspen’s bark is a living, functioning tissue that—along with the rest of the tree—succumbs quickly to fire.

强对比是考点。aspens易着火，却需要火。而the bark of most trees 由于有很多死细胞。这推出－－火有利于aspens的活细胞。正好与A选项不谋而合。C错在说aspens 难着火。

Q35:

The primary purpose of the passage is to explain the

qualities that make a particular organism unique
evolutionary change undergone by a particular organism
reasons that a phenomenon benefits a particular organism
way in which two particular organisms compete for a resource
means by which a particular organism has been able to survive in a barren region

为什么不选E呢？

Q36:

It can be inferred from the passage that when aspen groves experience a “disturbance” (line 30), such a disturbance

leads to a hormonal imbalance within an aspen clone
provides soil conditions that are favorable for new shoots
thins out aspen groves that have become overly dense
suppresses the formation of too many new aspen stems
protects aspen groves by primarily destroying coniferous trees rather than aspens

ANS: A

感觉文章是说：fire之类的disturbance可以刺激促进Aspen的生长。否则，coniferous trees就会慢慢侵入Aspen的领地，然后遮住Aspen生长需要的阳光，使得Aspen消亡。

A觉得只是回答了其中某个过程或者某个现象——引起其中那个aspen clone的hormonal imbalance。这并不是disturbance最后真正导致的结果。

我觉得才不是这个意思呢。仔细看最后一句就会发现，讲的是针叶林阻止杨树的生长，幸好有火把他们烧掉，和36题最后一个选项正好符合，所以我觉得36题还是应该选E。

E原文定位最后一句，正好是同义变换；A离定位之处太远，属于非出题段落。

E说是destory掉针叶林而不是destory 杨树.这个说法不好.原文一直在说要用火烧杨树才对杨树有利.而用火烧就是destroy拉.所以E说法不妥.

以下是引用neverback在2004-12-17 15:00:00的发言：

Even more than mountainside slides
                    of mud or snow, naturally occurring forest fires promote the survival of aspen trees.
                    Aspens’ need for fire may seem illogical
                    since aspens are particularly vulnerable
                    to fires; whereas the bark of most trees
                    consists of dead cells, the aspen’s bark is a living, functioning tissue that—along
                    with the rest of the tree—succumbs quickly
                    to fire.

Q37:The author of the passage refers to “the bark of most trees” (line 6) most likely in order to emphasize the

vulnerability of aspens to damage from fire when compared to other trees
rapidity with which trees other than aspens succumb to destruction by fire
relatively great degree of difficulty with which aspens catch on fire when compared to other trees
difference in appearance between the bark of aspens and that of other trees
benefits of fire to the survival of various types of trees

MINE C

ANS A

请指教