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题型名称：逻辑顺序题
别称：逻辑送命题
所属类别：文章结构
题型特点：费时费力，模棱两可，似是而非
是否需要通读段落：需要
答题步骤：3步
总时长：1分钟
以下段落节选自SAT OG Writing and Language Test 1, Passage 1.
[1] The main environmental problem caused by the production of Greek yogurt is the creation of acid whey as a by-product. [2] Because it requires up to four times more milk to make than conventional yogurt does, Greek yogurt produces larger amounts of acid whey, which is difficult to dispose of. [3] To address the problem of disposal, farmers have found a number of uses for acid whey. [4] They can add it to livestock feed as a protein supplement, supplement and convert it into gas to use as fuel in electricity production. [5] If it is improperly introduced into the environment, acid-whey runoff can pollute waterways, depleting the oxygen content of streams and rivers as it decomposes. [6] Yogurt manufacturers, food scientists, and government officials are also working together to develop additional solutions for reusing whey.
To make this paragraph most logical, Sentence 5 should be placed:
A. where it is now.
B. after sentence 1.
C. after sentence 2.
D. after sentence 3.
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**审题，识别题型 **
逻辑顺序题的题干特征非常容易辨认，通常题目设问会分为以下几种：
1、To make this paragraph most logical, sentence X should be placed：
2、To improve the cohesion and flow of this paragraph, the writer wants to add the following sentence. “XXXXXXXXXX.” The sentence would most logically be placed：
3、To make the passage most logical, paragraph X should be placed：
与此同时，该段落里的每个句子前都会有明显的序号标识。当看到这样的题干特征，就能判断是逻辑顺序题无疑了，我们就需要运用对应的解题步骤进行答题。
P.S. 识别题型是做题的首要及关键步骤，如果题型识别有误或者考点判断错误，则会直接影响做题思路。
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优先理解所需要排序的句子，
留意句子中的特殊词汇
（包括逻辑连接词，
代词，专有名词等）
[5] If it is improperly introduced into the environment, acid-whey runoff can pollute waterways, depleting the oxygen content of streams and rivers as it decomposes.
第五句是需要排序的句子，在这个句子中显然能看到一个由if引导的条件句
”if…., X can…”
这句话的意思可以理解为
“如果它被不恰当地引入到坏境里，乳清酸废物可以污染水道，在分解过程中耗尽河流中的氧气含量。”
主句中表述了一个“不良的影响”或“坏的结果”。
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回到段落中逐句理解
判断句与句之间的逻辑关系是否紧密
[1] The main environmental problem caused by the production of Greek yogurt is the creation of acid whey as a by-product. [2] Because it requires up to four times more milk to make than conventional yogurt does, Greek yogurt produces larger amounts of acid whey, which is difficult to dispose of. [3] To address the problem of disposal, farmers have found a number of uses for acid whey. [4] They can add it to livestock feed as a protein supplement, supplement and convert it into gas to use as fuel in electricity production. [6] Yogurt manufacturers, food scientists, and government officials are also working together to develop additional solutions for reusing whey.
第一句为主旨句，提出了段落的主旨：生产希腊酸奶所带来的环境问题是由于一种副产品——乳清酸的产生。
第二句说明了原因及乳清酸的特征：需要四倍的牛奶（才能生产出希腊酸奶），而乳清酸是难以分解的。
第一句与第二句间存在紧密的因果关系，不能被分割。
第三句为过渡句，即将引出解决方案：为了解决这个问题，农民们发现了各种乳清酸的用途。
当看到这里，我们就能发现在句子中涉及到problem，而前文并没有出现problem的描述，显然逻辑关系不够紧密。刚刚在Step 2中我们能概括出所需要排序的句子描述的正好是一个“不良的影响”或“坏的结果”，与第三句中的problem所对应。因此需要把第五句放在第二句的后面，对应选项C。
阅读速度较快的同学还可以把后文通读一遍进行验证。（第四句列举了具体的用途，第六句为总结句）
大家都学会了吗？来试着独立完成以下的练习：
[1] But once your eyes had adjusted to the task, they were unmistakable: perfectly formed little stone disks. [2] Our father told us they were fossilized crinoids. [3] Some were embedded in large stones, while others were loose among the pebbles. [4] Still others, the best ones, were cylinders as fat as my thumb, with hollow star-shaped centers, their outlines as distinct as when the crinoids were alive. [5] When either of us located such a treasure, we'd snatch it up and crow, "Got one!". [6] At first, they were hard to see.
For the sake of logic and coherence of this paragraph, Sentence 6 should be placed:
A. where it is now
B. before Sentence 1
C. after Sentence 4
D. after Sentence 3
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