假如昨天下午全校师生进行了一次地震逃生演练（a practice of esca

问题：

假如昨天下午全校师生进行了一次地震逃生演练（a practice of escaping from an earthquake）。请展开合理想象，写一篇短文介绍这次演练的情况。不少于60词。

提示词：under the desk, cover the head, run out, one after another (一个接一个), walk on the right down the stairs (楼梯), get to (到达)。

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