大山因为有脊梁,所以挺拔俊美;人因为有脊梁,所以______。新闻因为有了脊梁,才能出淤泥而不染;新闻人因为有了脊梁,才能______,稳如泰山。填入括号部分最恰当的一项是:
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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