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  3. The distinctive architectural feature of the typical Broadway theater is the juxtaposition(毗邻)of two almost independent building

The distinctive architectural feature of the typical Broadway theater is the juxtaposition(毗邻)of two almost independent building

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问题     The distinctive architectural feature of the typical Broadway theater is the juxtaposition(毗邻)of two almost independent buildings facing and opening into one another through a proscenium arch(舞台拱幕). The audience sits in the auditorium structure and watches the actors perform in the stage house. This separation is more than an aesthetic impression, because the building codes require that a physical barrier protect the audience from a fire starting on the stage. A fireproof wall, rather than a mere partition separates the structures, and this separation is completed by a fireproof curtain that is rigged(操纵)to fall automatically and close the proscenium opening in case of fire. Automatic fire doors similarly close all other openings between the two structures. The codes keep such openings to a minimum.
    This separation designed in the nineteenth century in the United States is seen as a result of theater fires. It has produced a fundamental structural change from previous centuries without making much corresponding change in the appearance of the building. Most theaters of the sixteenth to eighteenth centuries were remodeled from banquet hall, tennis court, and other rectangular(长方形的)halls, and remained essentially a single structure with a thin partition for the proscenium wall.
    So far as the audience is concerned, a theater is primarily a place for entertainment. Its great attraction is the opportunity it affords for different experience. The audience approaches the theater with the expectation of some forms of glamour excitement, or emotional vividness. The architect and the decorator try to sustain and increase this excitement and anticipation as the spectator moves through the theater. One of the familiar architectural devices for this effect is spaciousness of lobby, and auditorium. Color and decoration are other devices for the same purpose, as seen in almost all theaters built before the twentieth century.
It can be inferred from the passage that which of the following materials would not be used to build a proscenium arch?
选项 A、Wood.
B、Concrete.
C、Metal.
D、Marble.
答案A
解析 推理判断题。从文章第一段第四句“…and this…the proscenium opening in case of fire．”可知，prosceniam arch应注意防火，而木头容易起火。由此可推知，不会用木头修建proscenium arch(拱形框架)。故选A。
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