An array of assignments of this type, in which each element is a two-element array that contains the high and low values to generate for the assignment.
该类型任务的数组,其中每个元素是一个两个元素的数组,该数组包含为任务生成的最高和最低分值。
3
The third element of the array is the number of points for this assignment type, so I have to invoke the to_s method to convert that integer into a string.