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a. sure b. fell c. tears d. As e. for f. crashes g. rules h. chunks i. high j. element 1. ____ disasters go, this one was terrible, but not unique, certainly not among the worst US air 2. ____ on record. There was the unusual 3. ____ of the bridge, of course, and the fact that the plane hit it at a moment of 4. ____ traffic. Then, too, there was the location of the event. Washington, the city of form and 5. ____ , turned chaotic by a blast of real winter and a single slap of metal on metal. The jets from Wshington National Airport that normally fly around the presidential monuments like hungry gulls are 6. ____ the moment represented by the one that 7. ____ . And there was the aesthetic clash as well -- blue-and-green Air Florida, the name of a flying garden, sunk down among gray 8. ____ of ice in a black river. All that was worth noticing, to be 9. ____ . Still, there was nothing very special in any of it, except death, which, while always special, does not necessarily bring the nation to 10. ____ or to attention. Why, then, the shock here.
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A.
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B.
能更充分利用钢筋强度
C.
时大,时小
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A.
6个
B.
5个
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B.
3个
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A.
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B.
5个
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D.
少于4个
【单选题】在超筋范围内,加大受拉钢筋配筋率,截面抗弯能力
A.
有相应的增大
B.
能更充分利用钢筋强度
C.
时大,时小
D.
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