已知某钢筋混凝土单向板中受力钢筋的直径D=8mm,外包尺寸为3300mm,钢筋两端弯钩的增长值各为6、25D,钢筋因弯折引起的量度差总值为36mm,则此钢筋的下料长度为()mm。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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