作业帮这道GMAT逻辑题为什么不能选择B呀?
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/05/16 17:15:37
这道GMAT逻辑题为什么不能选择B呀?
Thatthe application of new technology can increase the productivity of existingcoal mines is demonstrated by the case of Tribnia's coal industry.Coal output per miner in Tribnia is double whatit was five years ago,even though no new mines have opened.
Whichof the following can be properly concluded from the statement about coal outputper miner in the passage?
A.If the number of miners working in Tribnian coal mines has remained constant inthe past five years,Tribnia's total coal production has doubled in that periodof time.
B.Any individual Tribnian coal mine that achieved an increase in overall outputin the past five years has also experienced an increase in output per miner.
C.If any new coal mines had opened in Tribnia in the past five years,then theincrease in output per miner would have been even greater than it actually was.
D.If any individual Tribnian coal mine has not increased its output per miner inthe past five years,then that mine's overall output has declined or remainedconstant.
E.In Tribnia the cost of producing a given quantity of coal has declined over thepast five years.
（文章不是说人均产煤量增加吗?为什么不能选B呢?）
Thatthe application of new technology can increase the productivity of existingcoal mines is demonstrated by the case of Tribnia's coal industry.Coal output per miner in Tribnia is double whatit was five years ago,even though no new mines have opened.
Whichof the following can be properly concluded from the statement about coal outputper miner in the passage?
A.If the number of miners working in Tribnian coal mines has remained constant inthe past five years,Tribnia's total coal production has doubled in that periodof time.
B.Any individual Tribnian coal mine that achieved an increase in overall outputin the past five years has also experienced an increase in output per miner.
C.If any new coal mines had opened in Tribnia in the past five years,then theincrease in output per miner would have been even greater than it actually was.
D.If any individual Tribnian coal mine has not increased its output per miner inthe past five years,then that mine's overall output has declined or remainedconstant.
E.In Tribnia the cost of producing a given quantity of coal has declined over thepast five years.
（文章不是说人均产煤量增加吗?为什么不能选B呢?）
新技术的采用 -----> 产量增加
所有矿场的人均产出是5年前的2倍,在没开设新矿场的情况下
问：下列哪个选项可以被恰当地推断出,根据文中对于 人均产出 的描述
A．如果过去5年的采矿者数量保持不变 -----> 在此期间总产量*2
Explanation:
总产量=所有矿场的人均产出*总人数,所有矿场的人均产出*2,总人数不变,那么总产量*2
CORRECT
B．过去5年产量上涨的任何一个矿场 都经历了 人均产出的增加
Explanation:
首先,所有矿场的人均产出增加 + 单一矿场产量增加无法推断出单一矿场的人均产出增加
其次,增长的原因也有可能是人均产出不变而采矿人数增加
C．假设过去5年开设了新矿----->人均产出增长将比实际更多
Explanation:
不一定,可能增长也可能减少
D．假设过去5年任何一个矿场没有增长其人均产量 -----> 总产量将下降或保持不变
Explanation:
总产量=所有矿场的人均产出*总人数
所有矿场的人均产出不变的情况下,总人数增加,总产量也会增加
E． 在过去五年产出一定数量煤的花销减少
IRRELEVANT
Manhattan GMAT Forum对于此题的解释：
http://www.manhattanprep.com/gmat/forums/cr-demonstrated-byt-he-case-of-tribinia-s-coal-industry-t9589.html
所有矿场的人均产出是5年前的2倍,在没开设新矿场的情况下
问：下列哪个选项可以被恰当地推断出,根据文中对于 人均产出 的描述
A．如果过去5年的采矿者数量保持不变 -----> 在此期间总产量*2
Explanation:
总产量=所有矿场的人均产出*总人数,所有矿场的人均产出*2,总人数不变,那么总产量*2
CORRECT
B．过去5年产量上涨的任何一个矿场 都经历了 人均产出的增加
Explanation:
首先,所有矿场的人均产出增加 + 单一矿场产量增加无法推断出单一矿场的人均产出增加
其次,增长的原因也有可能是人均产出不变而采矿人数增加
C．假设过去5年开设了新矿----->人均产出增长将比实际更多
Explanation:
不一定,可能增长也可能减少
D．假设过去5年任何一个矿场没有增长其人均产量 -----> 总产量将下降或保持不变
Explanation:
总产量=所有矿场的人均产出*总人数
所有矿场的人均产出不变的情况下,总人数增加,总产量也会增加
E． 在过去五年产出一定数量煤的花销减少
IRRELEVANT
Manhattan GMAT Forum对于此题的解释：
http://www.manhattanprep.com/gmat/forums/cr-demonstrated-byt-he-case-of-tribinia-s-coal-industry-t9589.html