“呜、呜……”星期三下午,宁静的校园突然响起一阵警报声。我们赶紧跑出教室,只见校园到处浓烟滚滚,教室楼梯也被浓雾笼罩(zhào)着,接着四五六年级的同学用湿毛巾捂着口鼻,在老师的指引下弯着 “Woo, Woo ... ” Wednesday afternoon, a quiet sounded a sudden alarm sound on campus. We quickly ran out of the classroom, I saw thick smoke billowing around the campus, the classroom stairs were also covered with fog, and then 466 students covered with wet towels nose and mouth, bending under the guidance of the teacher