1. 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
1. 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
D 为什么不对，因为时态吗？
1)the work 作主语,谓语动词即使时一般现在数,也应该加s
2)没有人提过,我觉得d中用so-called改变句意,因为so-called是<所谓的 >的意思.原句中没有这种意思.而且原句有turn out
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发表于 2005-11-29 11:52:00
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