刘白羽的《火光在前》原稿有一段是这样写的:王春像洗了一个澡,他的眼睛发光了,脸上有了活跃的神气,腰板也挺直了……定稿时作者把“活跃的神气’’改为“活气”,这样改的原因是
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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