有一首公益广告足这样唱的：“人小志气大，辛苦我不怕。日常学雷锋，平凡也伟大。叔叔把我夸，奶奶笑哈哈。大家做好事，处处传佳话。”今天来自各行各业的党员干部、普通职工，他们在一个共同的精神感召下忙碌着，帮助他人，提升自己。关于雷锋精神，下列说法错误的是（    ）

①历久弥新，是中华优秀文化的重要组成部分

②顺应时代，展现了平凡道德实践的经济价值

③凝聚力量，是社会主义核心价值体系的基础

④植根群众，丰富和发展了社会主义先进文化

Only after she had arrived home _______ her appointment with the doctor.

画出△ABC绕点O顺时针旋转90°的△A₂B₂C₂．

阅读短文，判断正误。

    I'm Fangfang. I live in a village. It's small but beautiful. Look! That is my house. There are some trees near it. Behind the house there's a big river. You can see boats on the river. Many ducks are beside the boats. How lovely! Oh, many flowers are among (在……之中）the trees. Let's get some for our teachers.