已知某砂土地基的抗剪强度指标φ=36°。地基中某点的小主应力σ3=180kPa,大主应力σ1=500kPa,求该点是否会发生剪切破坏?
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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