求助一道新G阅读逻辑10套里的题目

rosyljUID: 2864460

2.Comparison of the growth rings of ancient trees
enables scientists to determine from a piece of tim-
ber the year in which the tree used for the tim-
ber was felled．Hence, by analyzing the growth rings
in timber surviving from ancient buildings, archaeolo-
gists can determine precisely when those buildings
were constructed．
Which of the following is an assumption on which
the argument depends？
(A) The timber used for construction purposes in
ancient times was made from very old trees．
(B) The timber that was used in ancient building
construction had not, prior to being used in the
construction of the buildings, lain unused for
an indeterminable amount of time．
(C) The growth rings of any tree felled in a given
year are identical to the growth rings of any
other tree felled in that year．
(D) The oldest of the ancient buildings that survive
to the present day were constructed of the most
durable woods．
(E) Ancient builders did not use more than one type
of wood for the construction of a given
building．
答案是B，但是我觉得B答案似乎是原论点的否定，可是答案要求不是基于原论点可以得到什么设想吗？不是很明白，求解答

苏梳眠UID: 2717864

短文强调的是树木被砍伐时刻和建筑物建造时刻的相关性，即树木砍伐了，过了多久才被用于建筑，这个时间段必须知道，否则就不能用树木的砍伐时刻去判断建筑的建造时刻，因为存在indeterminable amount of time。这便是B选项。

rosyljUID: 2864460

嗯嗯，我明白了，谢谢解答 2# 苏梳眠

米兰啸西风UID: 3136730

4# dq224

短文说，可以通过古树的年轮来推算以古树为木材的建筑的年份。题目问这是基于何种假设，答案应为B，假设为：古建筑用的是当时砍伐的木材，而不是存放已久的木材。因为如果用存放已久的木材，就无法准确推算建筑的年份。。。

希望对你有帮助:)