作业帮GMAT一道CR,help~
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GMAT一道CR,help~
Although fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.
Which of the following, if true, most seriously undermines the argument?
(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.
(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
(C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
(E) Shungite itself is formed only under distinctive conditions.
OA是D,英雄们给解释一下
From 1978 to 1988, beverage containers accounted for a steadily decreasing percentage of the total weight of household garbage in the United States. The increasingly widespread practice of recycling aluminum and glass was responsible for most of this decline. However, although aluminum recycling was more widely practiced in this period than glass recycling, it was found that the weight of glass bottles in household garbage declined by a greater percentage than the weight of aluminum cans.
Which of the following, if true of the United States in the period 1978 to 1988, most helps to account for the finding?
(A) Glass bottles are significantly heavier than aluminum cans of comparable size.
(B) Recycled aluminum cans were almost all beverage containers, but a significant fraction of the recycled glass bottles had contained products other than beverages.
(C) Manufacturers replaced many glass bottles, but few aluminum cans, with plastic containers..
OA是C。A,B为什么不对？
Although fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite. Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.
Which of the following, if true, most seriously undermines the argument?
(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.
(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.
(C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.
(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
(E) Shungite itself is formed only under distinctive conditions.
OA是D,英雄们给解释一下
From 1978 to 1988, beverage containers accounted for a steadily decreasing percentage of the total weight of household garbage in the United States. The increasingly widespread practice of recycling aluminum and glass was responsible for most of this decline. However, although aluminum recycling was more widely practiced in this period than glass recycling, it was found that the weight of glass bottles in household garbage declined by a greater percentage than the weight of aluminum cans.
Which of the following, if true of the United States in the period 1978 to 1988, most helps to account for the finding?
(A) Glass bottles are significantly heavier than aluminum cans of comparable size.
(B) Recycled aluminum cans were almost all beverage containers, but a significant fraction of the recycled glass bottles had contained products other than beverages.
(C) Manufacturers replaced many glass bottles, but few aluminum cans, with plastic containers..
OA是C。A,B为什么不对？
(C) The mineral shungite itself contains large amounts of carbon,from which the fullerenes apparently formed.
(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
汗,好几个单词都不会,字典都查不到,没办法,但是题目还是可以做的.
答案不是C,题目需要undermine 那个argument,哪个?就是distinctive conditions of temperature and pressure推出这个发现可以评估关于那个时候的地球crust的blabla,从c中提到的shungite与conditions无关,与后面的blabla都没关,所以无效选项.
D,怎么看都不像,但是答案应该就是他,我凑合翻译一下啊,那个天然的blabla是排列在之前一个未知晶体结构里的,没错吧,哈,既然是未知晶体结构,靠这个又怎么去分析以前的地球是啥样的呢,或许这个晶体是外星陨石掉下来的
第二道题,A说玻璃瓶比铝瓶重,跟上面没有关系啊,上面说的是玻璃瓶下降的重量比重比铝瓶下降的多,是玻璃瓶跟玻璃瓶比,不是跟铝瓶比,这个理解了就ok啦；B是无关选项,这道题目从最开始就说了是饮料瓶,你说别的瓶子干啥,无关!
(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.
汗,好几个单词都不会,字典都查不到,没办法,但是题目还是可以做的.
答案不是C,题目需要undermine 那个argument,哪个?就是distinctive conditions of temperature and pressure推出这个发现可以评估关于那个时候的地球crust的blabla,从c中提到的shungite与conditions无关,与后面的blabla都没关,所以无效选项.
D,怎么看都不像,但是答案应该就是他,我凑合翻译一下啊,那个天然的blabla是排列在之前一个未知晶体结构里的,没错吧,哈,既然是未知晶体结构,靠这个又怎么去分析以前的地球是啥样的呢,或许这个晶体是外星陨石掉下来的
第二道题,A说玻璃瓶比铝瓶重,跟上面没有关系啊,上面说的是玻璃瓶下降的重量比重比铝瓶下降的多,是玻璃瓶跟玻璃瓶比,不是跟铝瓶比,这个理解了就ok啦；B是无关选项,这道题目从最开始就说了是饮料瓶,你说别的瓶子干啥,无关!