• 　　使用随机数生成两个数值序列并输出到屏幕，每个序列含有20个元素，每个元素的取值范围为[1, 20]；

• 　　对这两个序列进行排序，将结果输出到屏幕；

• 　　合并这两个序列，将产生的新序列输出到屏幕；

• 　　计算合并序列中元素7的个数，将结果输出到屏幕；

• 　　移除重复性元素，将产生的新序列输出到屏幕；

• 　　逆转元素顺序后，将产生的新序列输出到屏幕

-•　Use a random number generator and two numerical sequence output to the screen, each sequence contains 20 elements, each element of the range [1, 20]　

•　sort these two sequences, and outputs the result to the screen　

•　merge these two sequences, the new sequence will produce the output to the screen　

•　Calculate the number of elements in the combined sequence 7, the results output to the screen　

•　removing repetitive elements, the new sequence is output to the screen　

•　After reversing the order of elements, the new sequence will produce the output to the screen