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题库 / GMATLA-RC-70
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.
The author of the passage refers to "the bark of most trees" (see highlighted text) 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
此讲解的内容由AI生成，还未经人工审阅，仅供参考。
正确答案是 A。 作者在这段文字中提到了大多数树木的树皮，是为了强调杨树对比其他树木来说对火的脆弱性。因为其他的树的树皮是死的细胞，但是杨树的树皮是活的、功能性的组织，所以它会很快就会被火摧毁。因此，选项 A 就是最正确的答案，它强调了杨树与其他树木相比对于火伤害的脆弱性。
看快了。。我还以为是 其他树皮都死了 就aspen的还活着呢。。
A. succumb：死，aspen不同于其他树，很容易被摧毁
D. 未提及appearance
” 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”，前面提及Aspen需要火看起来不合理因为易受到伤害， whereas后转折，大不多数树树皮是死的，而Aspen树皮是活的，抵挡不住火
succumb：v. 屈服; 屈从; 抵挡不住(攻击、疾病、诱惑等);bark树皮
succumb：v. 屈服; 屈从; 抵挡不住(攻击、疾病、诱惑等);
along with the rest of the tree前后都有破折号，不是tree--succumbs
whereas引导的转折是其他树皮和白杨树皮之间的转折，而不是分号之后和分号之前的转折。也就是说，白杨树和其他树皮之间的转折关系是白杨树对于火来说比其他树脆弱的原因
为什么D不对
the bark of aspens and bark of other trees的appearance外表,文章沒有提及, 文章只提及生物組織的差異,一個是 dead cells,另一個是 living, functioning tissue
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. Aspens' need for fire may seem illogical since aspens are particularly vulnerable to fires; whereas the bark of most trees consists of dead cells,
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.
我这都能错选B我服了
提到barks of most trees作用是：
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
whereas引导的转折状语从句，把大多数树和白杨树做对比。而the aspen's bark is a living, functioning tissue that-along with the rest of the tree-succumbs quickly to fire，是为了解释说明前面aspens are particularly vulnerable to fires-为什么白杨树对于火特别脆弱
succumb 屈服于
不能秒选。。。不能秒选。。。
读懂文章真的太太太重要了
错选b。没有完全理解问题的意思。b本身错误因为所有的树都会这样。原文中用bark就是要说明aspen的vunerability.