高考试题对球的考查中,有一类问题是多球组合体的问题.解决这类问题要注意到球与球之间的位置关系类似于圆与圆的位置 One of the problems in the examination of high examination questions on the ball is the problem of multi-ball combinations. To solve such problems, it should be noted that the positional relationship between the ball and the ball is similar to the position of the circle and the circle.