书写板

例句：

1. 1. The teacher uses a whiteboardto explain the math problem.
   老师使用白板来解释数学问题。
2. 2. The students are writingon the chalkboard during thetest.
   学生们在考试期间在黑板上写字。
3. 3. The blackboard is covered with equationsand diagrams for the lesson.
   黑板上覆盖着方程式和图表，用于这节课的教学。