feifei-60~查前辈的帖子没有结果

鸩鸩

One of the more reliable methods of determining regional climatic conditions in prehistoric periods is to examine plant pollen trapped in glacial ice during ancient times. By comparing such pollen samples with spores take from modern vegetation, scientists can figure out approximately what the weather was like at the time of pollen deposition. Furthermore, by submitting the prehistoric samples to radiocarbon dating techniques, we can also determine when certain climatic conditions were prevalent in that portion of the globe.
Which one of the following may be inferred from the information in the passage?
(A) The earth has undergone several glacial periods.
(B) Radiocarbon dating can be corroborated by glacial evidence.
(C) Similarities between prehistoric and contemporary climates do not exist.
(D) Pollen deposition is a fairly continuous process.
(E) Certain flora are reliably associated with particular climatic conditions.



答案：E
我选的是A.根据原文，如果没有经历过glacial ice age，怎么会有pollen可以研究呢？

guotonghao123

A项说的是经历过several galacial periods,  然后文中并没有说是几次，只是说可以根据flora判断，可以是一次也可是几次

鸩鸩

A项说的是经历过several galacial periods,  然后文中并没有说是几次，只是说可以根据flora判断，可以是一次也可是几次

-- by 会员 guotonghao123 (2012/11/22 20:51:28)

可以说是因为E比A更优吗？

guotonghao123

我个人感觉E比A项更好，并且，A项就算没有several，也只是根据文中的一句话得出来的，而E项则是根据文中全部意思推断出来的，所以个人感觉E会好些