过空间一点与两异面直线成等角α的直线有几条?这个问题常见于高三复习资料中,但都是就题而论.本文论图通过讨论,得到一般的结论.设异面直线 a、b成β角,过空间任意一点O的直线 l 与 a,b成等角α.下面求满足这种条件的直线 l 有几条. There are several lines that have a space a isometric angle α with two different sides. This problem is commonly seen in the third year review materials, but all of them are on the topic. This paper discusses and obtains general conclusions. A, b into β angle, over any point in the space of a straight line l and a, b into an isometric angle α. The following to meet the conditions of the line l there are several.