求教大全sectionB 10题

讨论区关于此题无更好的解释.哪位前辈能帮忙解释一下.

The work of mathematician Roger Penrose in the early 1970s, on the geometry of what are called aperiodic tiles, turned out to describe the architecture of a previously unknown class of crystals.

(A) what are called aperiodic tiles, turned out to describe

(B) what is called aperiodic tiles, describes

(C) aperiodic tiles, describing

(D) so-called aperiodic tiles, describe（A）

(E) aperiodic tiles, it turned out to describe

主语是 work,后面应是is called, describes. 为什么选A呀,

楼主可先看下下面这个贴，里面有个对换表，你可以找到你这题在大全987中的位置，然后可以用搜索功能搜索以前的讨论贴。

http://forum.chasedream.com/dispbbs.asp?boardID=23&ID=79830&page=1

下面这个你也可参考一下，如还有问题再讨论。

http://forum.chasedream.com/dispbbs.asp?BoardID=23&ID=57755