n.(学生的)活页练习题；工作记录表
Site provided huge amount of free worksheet for children in all school subjects. 网站提供大量各种学科项目练习题.
This is an empty space in a worksheet. 这是工作表的空白空间。
Workbook must contain at least one worksheet. 工作簿必须包含至少一个工作表。
