1. For the statistics of mumps epidemic situation in a province, it is necessary to know not only the number of cases every day, but also the changes and trends of the epidemic situation, and it is best to use a (broken line) statistical chart.

2. It is appropriate to represent (c) with statistical chart.

(1) Number of people in each workshop of the factory. B. the absenteeism rate of each class in the school. C. the patient's temperature changes. D. awards of students in each class. )