問題詳情

Part II Reading comprehension (10%) 2-1 (CEA)    Liquid crystals constitute a unique state of matter with the mobility of liquids and the optical properties of solids. Whether they are a pure state of matter in the classic sense is arguable, but they are an important, though relatively unstudied, kind of material. Among other things, they are the basis for highly accurate mapping of heat patterns of surfaces; they can be used as chemical solvents that permit precise spatial orientation of molecules in a solution; they can detect radiation at different wavelengths; and they appear on the commercial scene in the form of vivid display devices that cannot be washed out by bright surrounding light. And perhaps even more significant, because many basic life processes involve liquid crystals, they may someday provide us with increased understanding and control over those processes.
1.The primary purpose of the passage is to
(A)Describe the structure that characterizes the state of matter called a liquid crystal
(B) Show how the optical properties of liquid crystals depend on their physical state
(C) Present liquid crystals as an interesting and useful kind of material
(D) Define liquid crystals in mathematical terms
(E) Enumerate the life process involving liquid crystals

參考答案

答案：[無官方正解]
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)

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