阅读问题

钰剑乘风UID: 3279007

Volcanic rock that forms as fluid lava chills rapidly is called pillow lava . This rapid chilling occurs when lava erupts directly into water (or beneath ice) or when it flows across a shoreline and into a body of water. While the term â

钰剑乘风UID: 3279007

Volcanic rock that forms as fluid lava chills rapidly is called pillow lava . This rapid chilling occurs when lava erupts directly into water (or beneath ice) or when it flows across a shoreline and into a body of water. While the term â

钰剑乘风UID: 3279007

Volcanic rock that forms as fluid lava chills rapidly is called pillow lava . This rapid chilling occurs when lava erupts directly into water (or beneath ice) or when it flows across a shoreline and into a body of water. While the term â

钰剑乘风UID: 3279007

好奇怪文章怎么发不上来》》

钰剑乘风UID: 3279007

Volcanic rock that forms as fluid lava chills rapidly is called pillow lava (pillow lava: 枕状熔岩). This rapid chilling occurs when lava erupts directly into water (or beneath ice) or when it flows across a shoreline and into a body of water. While the term “pillow lava” suggests a definite shape, in fact geologists disagree. Some geologists argue that pillow lava is characterized by discrete, ellipsoidal masses. Others describe pillow lava as a tangled mass of cylindrical, interconnected flow lobes. Much of this controversy probably results from unwarranted extrapolations of the original configuration of pillow flows from two-dimensional cross sections of eroded pillows in land outcroppings (OUTCROP (outcrop: n.露出地面的岩层)). Virtually any cross section (cross section: n.横截面) cut through a tangled mass of interconnected flow lobes would give the appearance of a pile of discrete ellipsoidal masses. Adequate three-dimensional images of intact pillows are essential for defining the true geometry of pillowed flows and thus ascertaining their mode of origin. Indeed, the term “pillow,” itself suggestive of discrete masses, is probably a misnomer.
24.
Which of the following is a fact presented in the passage?
(A) The shape of the connections between the separate, sacklike masses in pillow lava is unknown.
More accurate cross sections of pillow lava would reveal the mode of origin.
(C) Water or ice is necessary for the formation of pillow lava.
(D) No three-dimensional examples of intact pillows currently exist.（C）
(E) The origin of pillow lava is not yet known.

钰剑乘风UID: 3279007

终于好了，为什么不能选E?

钰剑乘风UID: 3279007

求助

EnolateUID: 3283311

你前面那几个没有发完整的楼都是回答E的= =

钰剑乘风UID: 3279007

Enolate 发表于 2012-11-1 18:37
你前面那几个没有发完整的楼都是回答E的= =

那怎么会NOT KNOWN呢？

钰剑乘风UID: 3279007

Enolate 发表于 2012-11-1 18:37
你前面那几个没有发完整的楼都是回答E的= =

哦，我傻了，明白了
谢谢

EnolateUID: 3283311

钰剑乘风 发表于 2012-11-1 21:53
哦，我傻了，明白了
谢谢

不客气~~