根据短文内容，完成任务。

    Sally is an English girl. She is my English teacher, Mrs Brown's daughter. She is only five years old. She doesn't go to school. She likes playing ping-pong. Her favorite ping-pong player is Zhang Yining. Sally is in the ping-pong club. She goes to the ping-pong club every day. She plays ping-pong for two hours there. Sally has a sister. Her name is Maria. She is in our class. She likes singing. (A) She wants to join the music club, she sings every morning. (B)Her favorite singing star is Song Zuying. Maria says she wants to be a singing star like Song Zuying.

两宋时期，农具和耕作技术都有了显著发展，宋代发明的新的农具有（    ）

在一节数学活动课上，王老师将本班学生身高数据（精确到1厘米）出示给大家，要求同学们各自独立绘制一幅频数分布直方图，甲绘制的如图①所示，乙绘制的如图②所示，经王老师批改，甲绘制的图是正确的，乙在数据整理与绘图过程中均有个别错误．