〓DIES IN FLAMES〓组 NO题 分析研讨——NO.2-1B--s

米饭袜子UID: 2532172

NO. SECTION B---S


The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; together, these processes constitute the major parts of the carbon cycle. For the smooth operation of this cycle, degradation is just as important as synthesis: the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids, that green plants cannot use as sources of energy during respiration. The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi. Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to catalyze the oxidation of numerous inert products, thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.
25.
The passage contains information that would answer which of the following questions about the carbon cycle?
I.
What are some of the compounds that are broken down in the carbon cycle?
II.
Why are some compounds that are involved in the carbon cycle less reactive than others?
III.
What role do bacteria and fungi play in the carbon cycle?
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
26.
The author implies that which of the following is the primary reason that degradation is as important as synthesis to the smooth operation of the carbon cycle?
(A) Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
(B) The synthesis of some organic material deprives life processes of an energy source.
(C) Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
(D) Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.
(E) Bacteria and fungi could not survive if some carbon compounds were not degraded.
27.
The author’s contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?
(A) Both aerobes and anaerobes provide sources of energy through the decomposition of organic material.
(B) Most compounds containing carbon are unavailable as energy sources except to some bacteria and fungi.
(C) Bacteria and fungi break down inert material in ways that do not involve oxidation.
(D) Many compounds remain inert, even in the presence of bacteria and fungi.
(E) Bacteria and fungi assist in the synthesis of many organic compounds.


汇总统计
第一组：A B C（done~) D E F . p& t. i! F: o' g1 T8 o! Z+ Y# Q
第二组：A B C D E F
第三组：A B C D E F

sherry1225UID: 2192554

提个小意见哈，lz最好把分析写在一个帖子里面

Alex_2009UID: 2616286

出题点总结与猜想：
可以把原文的四句分成四段来分析，这样更清楚。
The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态)(开头先给biosphere一个定义). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously(不断的合成、转换、分解); together, these processes constitute the major parts of the carbon cycle.(深入一层，谈到了biosphere里的carbon cycle----关键点). （相当于背景介绍，引出下文。）
（紧接着开始碳循环的运转机理）For the smooth operation of this cycle, degradation is just as important as synthesis（本句重点，冒号后面都是对它的解释，这里该出题了，显然会是出题点）: the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids, that green plants cannot use as sources of energy during respiration.

The release of the carbon in these compounds for recycling depends almost entirely on（引出本句重点，这里也是出题点） the action of both aerobic and anaerobic bacteria(好氧厌氧细菌) and certain types of fungi(真菌). (讲到了碳的释放过程中细菌和真菌的重要性)  
Some bacteria and fungi possess the unique and extremely important（提示这里是出题点：关于细菌与真菌的作用） biochemical asset of being able to catalyze the oxidation of numerous inert products(惰性产物), thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.（解释细菌与真菌为什么重要，它们的作用）
25.
The passage contains information that would answer which of the following questions about the carbon cycle?（全文点的掌握）
I.
What are some of the compounds that are broken down in the carbon cycle?（numerous inert products）
II.
Why are some compounds that are involved in the carbon cycle less reactive than others?
III.
What role do bacteria and fungi play in the carbon cycle?（catalyze ）
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
26.
The author implies that which of the following is  that the primary reason degradation is as important as synthesis to the smooth operation of the carbon cycle?（答案：第二段冒号后的句子换一种表达）
(A) Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
(B) The synthesis of some organic material deprives life processes of an energy source.
(C) Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
(D) Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.
(E) Bacteria and fungi could not survive if some carbon compounds were not degraded.
27.
The author’s contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?（答案：最后一段换一种表达）
(A) Both aerobes and anaerobes provide sources of energy through the decomposition of organic material.
(B) Most compounds containing carbon are unavailable as energy sources except to some bacteria and fungi.
(C) Bacteria and fungi break down inert material in ways that do not involve oxidation.
(D) Many compounds remain inert, even in the presence of bacteria and fungi.
(E) Bacteria and fungi assist in the synthesis of many organic compounds.

本文属于科技说明文，讲的就是一个碳循环，讲的也很简单，就是碳循环的两个重要环节：分解和合成，第二段明显突出了分解：degradation is just as important as synthesis。紧接着就介绍了为什么；然后进一步深入，说明分解依赖于the action of both aerobic and anaerobic bacteria(好氧厌氧细菌) and certain types of fungi(真菌)。紧接着再说明了这两者起的到底什么作用。
我认为要做好该类题目主要在于把握这种步步深入模式，有抽象问题到具体环节，由整体到局部的关系。
这样的话逻辑就清楚了，做题更不在话下~~~  出题点就在每次深入时“问一个为什么”。
分析结束~~~
这是俺第一次分析啊，不足之处还请给位多多指教~~~


本文理解可能还在于这些科技名词，我把它的解释附上，方便大家理解。
biosphere: 生物圈
biosphere
的网络定义:
the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist

individual organisms
生物个体的层次

homeostatic system :
自体调节系统
homeostatic :adj, (社会群体的)自我平衡的,原状稳定的
homeostatic
的网络定义:
related to or characterized by homeostasis

organic compounds: 有机化合物
organic compound
的网络定义:
any compound of carbon and another element or a radical

synthesize: 综合, 使合成; 人工合成
synthesize
的网络定义:
combine so as to form a more complex, product; "his operas synthesize music and drama in perfect harmony"; "The liver synthesizes vitamins"

decompose: (使某物)变坏, 腐烂; 〈化〉分解(某物质、光线等)
decompose
的网络定义:
separate (substances) into constituent elements or parts

continuously: 不断地,连续地
continuously
的网络定义:
at every point; "The function is continuously differentiable"

constitute: 构成, 组成
constitute
的网络定义:
form or compose; "This money is my only income"; "The stone wall was the backdrop for the performance"; "These constitute my entire belonging ...

carbon cycle(碳循环).

polymer:
聚合物(体)
polymer
的网络定义:
a naturally occurring or synthetic compound consisting of large molecules made up of a linked series of repeated simple monomers

innumerable: 无数的, 数不清的
innumerable
的网络定义:
countless: too numerous to be counted; "incalculable riches"; "countless hours"; "an infinite number of reasons"; "innumerable difficulties"; "the ...

respiration: (植物的)呼吸
the metabolic processes whereby certain organisms obtain energy from organic molecules; processes that take place in the cells and tissues during

aerobic and anaerobic bacteria: 好氧厌氧细菌
Aerobic bacteria
的网络定义:
An aerobic organism or aerobe is an organism that has an oxygen based metabolism. Aerobes, in a process known as cellular respiration, use oxygen ...
Anaerobic bacteria
的网络定义:
An anaerobic organism is any organism that does not require oxygen for growth and may even die in its presence.

fungi: 真菌类(包括霉菌,食用伞菌,酵母菌等),似真菌的,由真菌引起的
fungi
的网络定义:
the taxonomic kingdom including yeast, molds, smuts, mushrooms, and toadstools; distinct from the green plants

biochemical: 生物化学的,
asset: 有价值的人或物; 优点, 长处

catalyze: 催化; 促进
catalyze
的网络定义:
change by catalysis or cause to catalyze

oxidation: 氧化
oxidation
的网络定义:
the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction

initiating: 开始
initiate
的网络定义:
initiate - originate: bring into being; "He initiated a new program"; "Start a foundation"

carbon dioxide: 二氧化碳
carbon dioxide
的网络定义:
a heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in ...

contention: 论点, 主张；竞争, 争夺
contention
的网络定义:
a point asserted as part of an argument

assist in：在…上给予协助

zzz.321UID: 2600329

2-1B-S

Thewhole biosphere, like the individual organisms that live inside it, exists in achemically dynamic state(dynamic state: 动态        . In this homeostatic system, a great number of organic compoundsare synthesized, transformed, and decomposed continuously; together, theseprocesses constitute the major parts of the carbon cycle. For the smooth operation of thiscycle, degradation is just as important as synthesis: the greenplants produce greatquantities of polymers, such as cellulose, and innumerable other compounds likealkaloids, terpenes, and flavonoids, that green plants cannot use assources of energy during respiration. The release of the carbon in thesecompounds for recycling depends almost entirely on the action of both aerobicand anaerobic bacteria and certain types of fungi. Some bacteria and fungi possess the unique and extremelyimportant biochemical asset of being able to catalyze the oxidation of numerousinert products, thereby initiating reaction sequences that producecarbon dioxide and so return much carbon to a form that actively enters intolife cycles once again.


25.
Thepassage contains information that would answerwhich of the following questions about the carbon cycle?（细节题，从原文较容易定位，位置已经标出）
I.
What are some of the compounds that arebroken down in the carbon cycle?
II.
Why are some compounds that are involved inthe carbon cycle less reactive than others?
III.
What role do bacteria and fungi play in thecarbon cycle?
(A         I only
(B         II only
(C         III only
(D         I and II only（E）
(E         Iand III only
26.
Theauthor implies that which of the following is the primaryreason that degradation is as important assynthesis to the smooth operation of the carbon cycle?
（貌似还是细节题，只是将原文的For the smooth operation of thiscycle做同义改写）
(A         Most of the polymers and organiccompounds found in the plant kingdom are chemically unstable.
(B         The synthesis of some organic materialdeprives life processes of an energy source.
(C        Decomposition permits the recycling of carbon that would otherwise be fixed incertain substances.
(D         Many organismscannot use plants as a source of food, but can feed on bacteria and fungi.（C）
(E         Bacteria and fungi could not survive ifsome carbon compounds were not degraded.
27.
Theauthor’s contention about the importance ofbacteria and fungi in the production of energy for life processes would be mostclearly strengthened if which of the following were found to be true?
（推断题,顺着原文的思路合理推断可以得到答案）
(A         Both aerobes and anaerobes providesources of energy through the decomposition of organic material.
(B         Most compounds containing carbon areunavailable as energy sources except to some bacteria and fungi.
(C         Bacteria and fungi break down inertmaterial in ways that do not involve oxidation.
(D         Many compoundsremain inert, even in the presence of bacteria and fungi.（B）
(E         Bacteria and fungi assist in thesynthesis of many organic compounds.


因为我是学化学的，所以感觉看这篇文章感觉相对来说还算比较轻松，毕竟化学和生物不分家，呵呵。
考点用下划线标出。下面是详细分析：

下划线表示答案的位置
颜色表示对写作有帮助的
颜色表示与阅读相关的
颜色表示文章的重要词语



The wholebiosphere, like the individual organisms that liveinside it, （这种插入语的句型很值得借鉴）exists in a chemically dynamic state (dynamic state: 动态        . Inthis homeostatic system, a great number of organic compounds are synthesized,transformed, and decomposed continuously;（前面都是交代背景知识，没有太多的出题价值，分号后面引出文章的一个关键词——carbon cycle，文章围绕这个展开）together（这个词用的比较特别，以后写作可以借鉴）, these processesconstitute the major（可能会提示关键词） parts of the carbon cycle（关键词）. For（表示原因，因果关系容易出题,同时此句为关键句） the smooth operation ofthis cycle, degradation is just as important assynthesis:（冒号后表解释，可能会出细节题） the green plants producegreat quantities of polymers, such as cellulose, and innumerable othercompounds like alkaloids, terpenes, and flavonoids, （多个并列词可以跳过）that green plants cannotuse as sources of energy during respiration. The release of the carbon in these compounds for recycling depends almost entirelyon the action of both aerobic and anaerobic bacteria and certain types offungi.（本句修饰方法比较多样，可借鉴） Some bacteria and fungipossess the unique and extremely（出现比较极端的形容词需要注意） important biochemical asset of being able to catalyzethe oxidation of numerous inert products, thereby （表结果，因果关系容易出题，逻辑连词有借鉴价值）initiatingreaction sequences that produce carbon dioxide and soreturn much carbon to a form that actively enters into life cycles once again.（…thereby…so…逻辑关系很清晰，写作时遇到多步推理可以使用）


本来是用word编辑的，这里可能效果不太好，好效果请看附件。

jessicaluluUID: 2471730

重点词topic以及我的心得体会
好词好句
对解题有帮助或提示作用者
干扰项
周一2-1-B-S
% |# M) T1 @0 b7 \, y1 X/ E The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; together, these processes constitute the major parts of the carbon cycle. For the smooth operation of this cycle, degradation is just as important as synthesis: the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids, that green plants cannot use as sources of energy during respiration（2-1）. The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi（1-1）. Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to catalyze the oxidation of numerous inert products, thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again（1-3，3）.
25.
The passage contains information that would answer which of the following questions about the carbon cycle?
I.
What are some of the compounds that are broken down in the carbon cycle?
II.
Why are some compounds that are involved in the carbon cycle less reactive than others?
III.
What role do bacteria and fungi play in the carbon cycle?
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
26.
The author implies that which of the following is the primary reason that degradation is as important as synthesis to the smooth operation of the carbon cycle?
(A) Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
(B) The synthesis of some organic material deprives life processes of an energy source.
(C) Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
(D) Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.
(E) Bacteria and fungi could not survive if some carbon compounds were not degraded.
27.
The author’s contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?
(A) Both aerobes and anaerobes provide sources of energy through the decomposition of organic material.
(B) Most compounds containing carbon are unavailable as energy sources except to some bacteria and fungi.
(C) Bacteria and fungi break down inert material in ways that do not involve oxidation.
(D) Many compounds remain inert, even in the presence of bacteria and fungi.
(E) Bacteria and fungi assist in the synthesis of many organic compounds.
这是一篇蛮简单的说明文，只要理清作者的写作意图，解题应该不难。其实全文只说了这样一件事：生物圈中的碳循环。细菌、真菌等微生物通过分解inert compounds帮助能量的传递，达到dynamic state。

25、clue已经被我从文中标出了，很明确。至于题干里的第二个选项，文中未提到这个意思。
26、A选项中unstable为干扰项，文中提到的是这些compounds cannot use as sources of energy during respiration。与文意不符。B选项没什么说的，第一个排除。C选项只要抓住recycling这道题就能作对了。D选项没搞清楚organism，细菌真菌，plants这几者的关系。E选项文中没提。
27、还是讲F和B的重要性，最后一句话提示了答案。

附上一张小学生物的PP，让这篇文更直观。
　a光合作用　b,d,g呼吸作用　土壤中的微生物即细菌、真菌等
E主要是植物产生的organism的转化

发散于aw：平衡，动态变化，生物链，微生物作为标签词被保存。该例子可用于例如政治类讲政府和public间相互依存的关系时可以打比方或者举例说明。

呃。。。PP上不上来，有兴趣的话看附件吧。。。

米饭袜子UID: 2532172

这篇比较容易，而且前面童鞋分析地差不多了，简单补充~

STEP ONE 题目分析（划线部分是后面题目的答案来源）

The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; together, these processes constitute the major parts of the carbon cycle. For the smooth operation of this cycle, degradation is just as important as synthesis: the green plants produce great quantities of polymers, such as cellulose, （25、26、27）and innumerable other compounds like alkaloids, terpenes, and flavonoids, that green plants cannot use as sources of energy during respiration. The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi. Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to catalyze the oxidation of numerous inert products, thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.
25.
The passage contains information that would answer which of the following questions about the carbon cycle?（其实这个第一题上来是小有难度的，它考的是对整个文章中细节的把握，但都集中在划线部分，算是降低了难度）
I.
What are some of the compounds that are broken down in the carbon cycle?
II.
Why are some compounds that are involved in the carbon cycle less reactive than others?
III.
What role do bacteria and fungi play in the carbon cycle?
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only
26.
The author implies that which of the following is the primary reason that degradation is as important as synthesis to the smooth operation of the carbon cycle?（找到as impoetan as,定位就可以了，然后就是根据releas推理一哈）
(A) Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
(B) The synthesis of some organic material deprives life processes of an energy source.
(C) Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
(D) Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.
(E) Bacteria and fungi could not survive if some carbon compounds were not degraded.
27.
The author’s contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?（根据划线部分易得答案）
(A) Both aerobes and anaerobes provide sources of energy through the decomposition of organic material.
(B) Most compounds containing carbon are unavailable as energy sources except to some bacteria and fungi.
(C) Bacteria and fungi break down inert material in ways that do not involve oxidation.
(D) Many compounds remain inert, even in the presence of bacteria and fungi.
(E) Bacteria and fungi assist in the synthesis of many organic compounds.

STEP TWO 出题点猜想与AW借鉴（橙色为文章分析出题点猜想，绿色为AW值得借鉴滴~）

The whole biosphere, like the individual organisms that live inside it（这种插入语很好用）, exists in a chemically dynamic state (dynamic state: 动态).（第一句算是个引子，引出文章内容，很平常，应该不会涉及提点） In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; together, these processes constitute the major parts of the carbon cycle.（到这里才是整个文章的TS，关键词也出现了，下面就是针对这个TS展开的~） For the smooth operation of this cycle, degradation is just as important as（特别提出分解的重要性，无论推理或细节，必为出题点~） synthesis: the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids（厚厚，这点儿真是让人小抓，几乎不认识，第二个词的中文意思我都不认识。。。不过这是后来分析的时候查了，当时做的时候直接忽略，反正是compounds的分解产物，肯定是乱七八糟的一些化学物质，首字母提取一哈就哦了，题目不会涉及太多，遇到这种情况，表慌~）, that green plants cannot use as sources of energy during respiration（前面的都是幌子，到这里才说出分解同样重要的真正原因）. The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi（开始讲分解途径了，新的概念 出现，必为出题点）. Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to（华丽地表达有。。。能力） catalyze the oxidation of numerous inert products, thereby（总结句） initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.

seiranzcc1UID: 2514067

不想重新编辑。。。。。

草木也知愁UID: 2487572

提个小意见哈，lz最好把分析写在一个帖子里面
sherry1225 发表于 2009-3-23 00:56

呵呵 等到他们都做完之后 我会做整理滴

vidyaUID: 2599950

The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; together, these processes constitute the major parts of the carbon cycle. For the smooth operation of this cycle, degradation is just as important as synthesis: the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids, that green plants cannot use as sources of energy during respiration. The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi. Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to catalyze the oxidation of numerous inert products, thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.
25.
The passage contains information that would answer which of the following questions about the carbon cycle?（细节题）
I.
What are some of the compounds that are broken down in the carbon cycle?
II.
Why are some compounds that are involved in the carbon cycle less reactive than others?
III.
What role do bacteria and fungi play in the carbon cycle?
(A) I only
(B) II only
(C) III only
(D) I and II only（E）
(E) I and III only
26.
The author implies that which of the following is the primary reason that degradation is as important as synthesis to the smooth operation of the carbon cycle?（细节题，主要是考察对degradation具体作用的理解）
(A) Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
(B) The synthesis of some organic material deprives life processes of an energy source.
(C) Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
(D) Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.（C）
(E) Bacteria and fungi could not survive if some carbon compounds were not degraded.
27.
The author’s contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?（推理题，这道题同上题一样是考察的细节相同）
(A) Both aerobes and anaerobes provide sources of energy through the decomposition of organic material.
(B) Most compounds containing carbon are unavailable as energy sources except to some bacteria and fungi.
(C) Bacteria and fungi break down inert material in ways that do not involve oxidation.
(D) Many compounds remain inert, even in the presence of bacteria and fungi.（B）
(E) Bacteria and fungi assist in the synthesis of many organic compounds.

The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; together, these processes constitute the major parts of the carbon cycle. For the smooth operation of this cycle, degradation is just as important as synthesis（表明文章的主题，考点）: the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids, that green plants cannot use as sources of energy during respiration.（表明那些物质不能被直接利用，有可能作为细节题出现） The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi. （具体说明degradation在carbon cycle中的作用，可能会以细节题的形式出现）Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to catalyze the oxidation of numerous inert products, thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.

ddcmj519UID: 176326

这个。碳循环。高中生物学过的基本都能猜个八准。大家都分析的差不多了。。我又留名的偷懒了。。

另外着里面的生词巨多。但是如果细心，发现那些术语前面基本都有such as，like等，就没必要深究了，知道是干啥用的即可。

而且，选项的话，就渐渐发现，无关选项>minor idea 所以排除法也不难。。就是花时间= =。

archaeologyUID: 2598252

The whole biosphere, like the individual organisms that live inside it, exists in a chemically dynamic state (dynamic state: 动态). In this homeostatic system, a great number of organic compounds are synthesized, transformed, and decomposed continuously; (背景介绍，出题的可能性不大）together, these processes constitute the major parts of the carbon cycle（中心词）. For the smooth operation of this cycle, degradation is just as important as synthesis: （冒号表明要对"同等重要"做出解释）the green plants produce great quantities of polymers, such as cellulose, and innumerable other compounds like alkaloids, terpenes, and flavonoids, （并列写出，一看就知道全是一些专用名词，不用怕怕，略读）that green plants cannot use as sources of energy during respiration. （原因）The release of the carbon in these compounds for recycling depends almost entirely on the action of both aerobic and anaerobic bacteria and certain types of fungi. Some bacteria and fungi possess the unique and extremely important biochemical asset of being able to catalyze the oxidation of numerous inert products, thereby initiating reaction sequences that produce carbon dioxide and so return much carbon to a form that actively enters into life cycles once again.

25.The passage contains information that would answer which of the following questions about the carbon cycle?
I.What are some of the compounds that are broken down in the carbon cycle?（就是那一系列名词）
II.Why are some compounds that are involved in the carbon cycle less reactive than others?
III.What role do bacteria and fungi play in the carbon cycle?（文章后面都在说他们的作用）
(A) I only
(B) II only
(C) III only
(D) I and II only
(E) I and III only

26.The author implies that which of the following is the primary reason that degradation is as important as synthesis to the smooth operation of the carbon cycle?
(A) Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
(B) The synthesis of some organic material deprives life processes of an energy source.  
(C) Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
(D) Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.（我选的这个选项，被source干扰了）
(E) Bacteria and fungi could not survive if some carbon compounds were not degraded.

27.The author’s contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?
(A) Both aerobes and anaerobes provide sources of energy through the decomposition of organic material.
(B) Most compounds containing carbon are unavailable as energy sources except to some bacteria and fungi.（分解不可用的碳正是细菌和真菌重要作用的体现）
(C) Bacteria and fungi break down inert material in ways that do not involve oxidation.
(D) Many compounds remain inert, even in the presence of bacteria and fungi.
(E) Bacteria and fungi assist in the synthesis of many organic compounds.