My name is Lucy. I have two good friends, Mary and June. June and I are twelve years old. Mary is thirteen years old. My birthday is November 11th．June's birthday is September 11th ．And Mary's birthday is January 18th. I like red, but they like green. Mary and June are in the same school. They have an Art Festival and a school trip every year, but I only have a Music Festival at my school.

画出下图中小旗绕O点顺时针旋转90度后的图形。

太平天国后期曾出现“国中无人，朝中无将”的危险局面的主要原因是（　）

有些鸟类在迁徙途中休息时,总有一些“站岗放哨”的鸟,当发现敌害时,它们会大声鸣叫,或者狂奔,或者使劲扇动翼,做起飞状,使群体迅速做出防御敌害的准备或者快速逃生。