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标题: [求助]逻辑题太难了，望指点迷津 [打印本页]

作者: mary1 时间: 2004-3-15 11:08 标题: [求助]逻辑题太难了，望指点迷津

Determing the authenticity of purported pre-Columbian artifacts is never easy.Carbon-14 dating of these artifacts is often impossible due to contamination by radioactive palladiym(which occurs naturally in the soils of Central and South America).However,historians and anthropologists have evolved two reliable criteria,which，utilized in combination,have proven effective for dating these artifacts.First,because authentic pre-Columbian artifacts characteristically occur in a coarse granular matrix that is shifted by major earthquakes,they often exhibit the unique scratch patterns known as gridding.In addition,true pre-Colmbian artifacts show a darkening in a surface color that is caused by centuries of exposure to the minute amounts of magnestium in the soil of the American.

The criteria above would be LEAST useful in judging the authenticity of which of the following?

a)An ax head of black obsidian unearthed from a kitchen midden
b)A pottery bowl with a red ocher design,found in the ruins of a temple
c)A set of gold ear weights emamented with jasper pendants
d)A black feather cape from a king's burial vault
e)A multicolored-woven sash found near the gravesite of a slave

Key D
My choice E
请告诉我此类题是否有“关键词”可以抓，让你一看就知道？fficeffice" />

作者: robert 时间: 2004-3-15 11:13

我认为这是一道weaken题，一般情况下否定结论，或否定假设。提干原因中提到物品出土后表面会变黑，恰好d是不能被检测出来的原因，因为黑羽毛不可能再变黑。fficeffice" />

作者: mary1 时间: 2004-3-15 11:15

谢谢你，但是按照你的解释，A也可以是答案呀？fficeffice" />

作者: robert 时间: 2004-3-15 11:17

标准：
1．文物上出现网格
2．由于接触土壤（中的magnestium）变黑
a)埋在地下的矿石
b)埋在地下的陶碗
c)有点玉石
d)墓穴里的羽毛披肩
e)墓地旁的腰带
这个问题就是要不是矿石，瓷器等，可以出现网格，要不就是能接触土壤，d)哪个也不沾边fficeffice" />

作者: crossmoon 时间: 2004-3-18 10:45

对，题干的原因中提到物品出土后表面会变黑，恰好d是不能被检测出来的原因，因为黑羽毛不可能再变黑。

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