Paragraph 4 Dissatisfaction with conventional explanations for dinosaur
extinctions led to a surprising observation that, in turn, has suggested a
new hypothesis. Many plants and animals disappear abruptly from the fossil
record as one moves from layers of rock documenting the end of the Cretaceous
up into rocks representing the beginning of the Cenozoic (the era after the
Mesozoic). Between the last layer of Cretaceous rock and the first layer of
Cenozoic rock, there is often a thin layer of clay. Scientists felt that they
could get an idea of how long the extinctions took by determining how long it
took to deposit this one centimeter of clay and they thought they could
determine the time it took to deposit the clay by determining the amount of
the element iridium (lr) it contained.
8. In paragraph 4, all the following questions are answered EXCEPT:
○Why is there a layer of clay between the rocks of the Cretaceous and
Cenozoic?
○Why were scientists interested in determining how long it took to deposit
the layer of clay at the end of the Cretaceous?
○What was the effect of the surprising observation scientists made?
○Why did scientists want more information about the dinosaur extinctions at
the end of the Cretaceous?
答案是1 選項3是文章一開始說Dissatisfaction with.....到in turn, has suggested a
new hypothesis.是回答到這個選項嘛?
想請益一下板友這種類型的EXCEPT題要怎麼看? 最近看到這種題都會看到眼花根本找不到
--
All Comments