题目内容
喷锚支护地段围岩局部集中漏水时，应在喷锚前采取措施将水封堵或集中引排。
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中心排水管的管材应符合国家标准《混凝土和钢筋混凝土排水管》（GB/T11836-1999）三级管的要求。
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The next morning some experts were sent to ________ the damage caused by the flood.
The prime minister succeeded in ________ the challenge to his authority(权威).
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